Curator (BS-17), Directorate General of Archaeology, Tourism, Archaeology & Museums Department – PPSC One-Liner 2025
This Curator (BS-17) PPSC One-Liner past paper 2025 is designed to help you prepare effectively. It contains solved questions from the Directorate General of Archaeology, Tourism, and Museums Department, allowing you to practice quickly and improve your exam performance.
Solved Curator (BS-17) PPSC One-Liner Past Paper 2025
General Knowledge
"Leopold von Ranke revolutionized historical scholarship by emphasizing primary sources and objective analysis. His methodology developed in the 19th century prioritized factual accuracy and critical examination of historical documents. Ranke’s approach laid the foundation for modern historiography advocating for a scientific method that influenced historians worldwide. His seminal works such as History of the Reformation in Germany underscored the importance of empirical evidence shaping the discipline’s focus on verifiable data. This rigorous approach remains a cornerstone of historical research ensuring narratives are grounded in authentic records rather than speculative interpretations."
"Fatehpur Sikri a city founded by Emperor Akbar served as the Mughal capital from 1571 to 1585. In 1582 Akbar introduced Deen-e-Ilahi a syncretic religious doctrine blending elements of Islam Hinduism Jainism and Zoroastrianism. This initiative reflected his vision of fostering religious tolerance within his diverse empire. The city’s architectural grandeur including the Buland Darwaza symbolizes Akbar’s reign. Deen-e-Ilahi though short-lived highlighted his innovative approach to governance aiming to unify his subjects under a common spiritual framework with Fatehpur Sikri as its epicenter."
"The Harappa Civilization flourishing between 2600 and 1900 BCE is a hallmark of the Bronze Age in South Asia. This period is characterized by the use of bronze tools urban planning and advanced trade networks. Harappa located in present-day Pakistan featured sophisticated city layouts drainage systems and standardized weights. The civilization’s advancements in metallurgy and urban development reflect the technological and cultural achievements of the Bronze Age. Its decline around 1900 BCE remains a subject of study with archaeological evidence providing insights into its societal structure and economic systems."
"The Mehrgarh Civilization dating back to 7000–2500 BCE is Pakistan’s earliest known Neolithic settlement. Located in Balochistan it marks the transition from hunter-gatherer societies to settled farming communities. Excavations reveal evidence of early agriculture domestication of animals and rudimentary crafts. Mehrgarh’s significance lies in its role as a precursor to the Indus Valley Civilization showcasing advancements in pottery and social organization. Its Neolithic context highlights the region’s contribution to early human development with archaeological findings offering valuable insights into the evolution of sedentary lifestyles in South Asia."
"Initiated in 1819 by Haji Shariatullah the Faraizi Movement was a religious reform effort in Bengal aimed at purifying Islamic practices. It emphasized adherence to fundamental Islamic principles rejecting un-Islamic customs prevalent among Bengali Muslims. The movement gained traction among rural communities advocating for social justice and religious orthodoxy. Under Shariatullah’s leadership and later his son Dudu Miyan it played a significant role in mobilizing peasants against colonial and feudal oppression. The Faraizi Movement’s legacy lies in its contribution to Islamic revivalism and social reform in 19th-century South Asia."
"William Cunnington an 18th-century English antiquarian is regarded as a pioneer in archaeological excavation. His systematic approach to excavating prehistoric sites particularly around Wiltshire England laid early groundwork for modern archaeology. Cunnington’s work on barrows and Stonehenge provided critical insights into Britain’s ancient past. By meticulously documenting findings he set a precedent for scientific excavation methods. His contributions though less celebrated than later archaeologists were instrumental in transitioning archaeology from antiquarianism to a disciplined field influencing subsequent generations of researchers studying ancient cultures and artifacts."
"Ashoka the Great a Mauryan emperor underwent a profound transformation after the Kalinga War’s devastation embracing Buddhism around 260 BCE. Initially a Hindu ruler known for conquests Ashoka adopted Buddhist principles of non-violence and compassion shaping his governance. His edicts inscribed on pillars and rocks across India promoted ethical conduct and social welfare. Ashoka’s patronage facilitated Buddhism’s spread across Asia leaving a lasting legacy in Indian history. His reign exemplifies how personal conviction can influence state policy fostering a legacy of peace and cultural integration."
"Signed in 1215 the Magna Carta was a pivotal agreement between King John of England and rebellious barons. This charter limited royal authority establishing principles of legal accountability and individual rights. It addressed grievances like arbitrary taxation and ensured protections for baronial privileges. The document’s clauses laid the foundation for constitutional governance influencing modern legal systems. By formalizing the relationship between the monarchy and its subjects the Magna Carta became a cornerstone of democratic ideals symbolizing the balance of power between rulers and the governed in medieval England."
"The Out of Africa theory posits that modern humans (Homo sapiens) originated in Africa approximately 200000–300000 years ago before migrating to other continents. Supported by genetic and fossil evidence this hypothesis suggests a single African origin for all human populations replacing earlier hominid species like Neanderthals. Archaeological findings such as those in Ethiopia’s Omo Valley corroborate this model. The theory underscores Africa’s central role in human evolution highlighting the migratory patterns that shaped global human diversity. Ongoing research continues to refine our understanding of these ancient movements."
"Sir John Marshall as Director-General of the Archaeological Survey of India led the 1920s excavations that revealed the Indus Valley Civilization. His work at sites like Harappa and Mohenjo-Daro uncovered a sophisticated urban culture dating to 2600–1900 BCE. Marshall’s systematic approach identified advanced city planning sanitation systems and trade networks reshaping understanding of South Asia’s ancient history. His findings highlighted the civilization’s cultural and economic complexity establishing it as a cornerstone of early urban development. Marshall’s legacy endures in the continued study of this Bronze Age civilization."
"Archaeology examines past human societies through material remains such as tools pottery and structures. By analyzing these artifacts archaeologists reconstruct ancient lifestyles economies and cultures. The discipline spans prehistoric and historical periods employing techniques like excavation and radiocarbon dating to uncover evidence. From Stone Age tools to medieval settlements archaeology provides insights into human development across millennia. Its interdisciplinary approach combining history anthropology and science ensures a comprehensive understanding of past things preserving humanity’s heritage and informing our knowledge of societal evolution across diverse civilizations."
"Sirkap Palace part of the ancient city of Taxila in Pakistan was a significant center of Hellenistic and Indo-Greek culture. Established around the 2nd century BCE Taxila was a hub of learning and trade blending Persian Greek and Indian influences. The palace excavated in the 19th century reflects sophisticated urban planning and architectural styles. Taxila’s UNESCO World Heritage status underscores its historical importance with archaeological remains revealing insights into ancient education religion and commerce making it a key site for understanding cultural interactions in South Asia."
"Zulfikar Ali Bhutto became Pakistan’s first Civilian Martial Law Administrator in 1971 following political turmoil. As president he navigated the country through the aftermath of the Bangladesh Liberation War implementing reforms to stabilize governance. Bhutto’s leadership saw the introduction of the 1973 Constitution a landmark in Pakistan’s political history. His tenure marked by nationalization policies and social reforms shaped modern Pakistan’s political landscape. Despite controversies Bhutto’s role as a civilian administrator during martial law remains a pivotal moment in the nation’s efforts to balance democracy and stability."
"Firdausi a 10th-century Persian poet composed the Shah Namah an epic chronicling Persia’s history and mythology. Commissioned by Mahmud Ghaznavi a prominent ruler of the Ghaznavid dynasty this work was completed in 1010 CE. The Shah Namah blends historical narratives with legendary tales preserving Persian cultural identity. Firdausi’s masterpiece crafted in Mahmud’s court reflects the era’s literary and political patronage. Its enduring influence lies in its role as a cornerstone of Persian literature inspiring generations with its vivid storytelling and cultural significance."
"The first Punjab Assembly election in Pakistan held in 1951 marked a significant step in establishing democratic governance post-partition. Conducted four years after the 1947 independence it reflected efforts to organize provincial governance amidst political and social challenges. The election facilitated the formation of a legislative body responsible for regional administration shaping Punjab’s political landscape. This milestone underscored Pakistan’s early democratic processes laying the groundwork for subsequent electoral systems. The 1951 election remains a key event in understanding the nation’s transition to self-governance following colonial rule."
"Prehistoric archaeology investigates human societies before written records focusing on cultures without textual documentation. This field examines artifacts tools and settlements from periods like the Stone Age to understand early human behavior and societal development. Techniques such as stratigraphy and radiocarbon dating help reconstruct timelines and lifestyles. By studying material remains prehistoric archaeology reveals insights into ancient technologies economies and social structures offering a window into humanity’s origins. Its focus on pre-literate societies distinguishes it from historical archaeology which relies on written sources."
"Pakistan’s Senate ensures equal provincial representation with each of the four provinces—Punjab Sindh Khyber Pakhtunkhwa and Balochistan—allocated 23 seats. This structure established under the 1973 Constitution balances regional interests in the federal legislative framework. Senators elected by provincial assemblies serve six-year terms with half the seats renewed every three years. This system promotes equitable representation addressing diverse provincial concerns within Pakistan’s bicameral parliament. The allocation of 23 seats each underscores the Senate’s role in fostering national unity and legislative equity across Pakistan’s diverse regions."
"Amir Khusrau a 13th-century Sufi poet and musician is credited with developing the Khayal music system a cornerstone of Hindustani classical music. This improvisational vocal style allows performers to explore melodic and rhythmic creativity within a raga framework. Khusrau’s innovations rooted in Persian and Indian musical traditions enriched South Asian cultural heritage. His contributions including compositions and poetic works bridged diverse cultural influences shaping the evolution of classical music. The Khayal system remains a vibrant tradition celebrated for its expressive depth and artistic flexibility."
"Islamabad was declared Pakistan’s capital in 1961 under Field Marshal Ayub Khan’s leadership. Designed as a planned city to replace Karachi Islamabad was strategically chosen for its central location and climate. Construction began in the 1960s with Greek architect Constantinos Apostolou Doxiadis leading the urban planning. This decision reflected Ayub Khan’s vision of modernizing Pakistan’s administrative infrastructure. Islamabad’s development as the political and administrative hub continues to symbolize the nation’s aspirations for progress and unity with its layout emphasizing functionality and aesthetic harmony."
"The cerebrum comprising about 85% of the brain’s mass is the largest part of the human brain. It is divided into two hemispheres each controlling various cognitive and motor functions. The cerebral cortex its outer layer handles complex processes like reasoning language and memory. Responsible for voluntary actions and sensory processing the cerebrum plays a central role in human consciousness. Its intricate neural networks facilitate higher-order functions distinguishing humans from other species. Neuroscientific research continues to explore the cerebrum’s role in shaping behavior intelligence and emotional responses."
"Shah Waliullah Dehlawi an 18th-century Islamic scholar authored 51 books significantly influencing South Asian Islamic thought. His works including Hujjatullah al-Baligha addressed theology philosophy and social reform blending Persian and Arabic scholarship. Waliullah’s writings sought to reconcile Islamic principles with contemporary challenges promoting intellectual revivalism. His translations particularly of the Quran into Persian made religious texts accessible to a broader audience. These 51 works remain foundational in Islamic studies shaping religious discourse and inspiring movements for reform and unity in the Indian subcontinent."
"The Constitution of Medina established by Prophet Muhammad in 622 CE is often called the Magna Carta of Islam. This treaty outlined a framework for coexistence among Muslims Jews and other tribes in Medina defining rights and responsibilities. It established principles of mutual protection justice and religious freedom fostering a unified community. As a foundational document it set a precedent for Islamic governance emphasizing social harmony and legal equity. The Constitution of Medina remains a critical reference for understanding early Islamic political and social organization."
"In 693 CE Umayyad Caliph Abdul Malik ibn Marwan introduced the dinar a standardized gold currency marking a significant reform in Islamic economics. Replacing Byzantine and Sassanid coins the dinar featured Arabic inscriptions and Islamic motifs symbolizing cultural and political independence. This currency facilitated trade across the expanding Islamic empire ensuring economic stability. Abdul Malik’s monetary reforms centralized financial systems enhancing administrative efficiency. The dinar’s legacy endures in modern currencies reflecting its historical role in shaping economic policies and fostering commerce in the early Islamic world."
"Sultan Alp Arslan a 11th-century ruler led the Seljuk Dynasty to prominence notably through the 1071 Battle of Manzikert. His leadership expanded Seljuk influence across Central Asia and the Middle East establishing a powerful Turkic empire. The dynasty known for its patronage of art and architecture blended Persian and Islamic traditions. Alp Arslan’s military and administrative achievements strengthened Seljuk governance influencing subsequent Islamic empires. The Seljuk Dynasty’s legacy lies in its cultural and political contributions shaping the medieval Islamic world and facilitating cross-cultural exchanges."
Solved Curator (BS-17) PPSC One-Liner Past Paper 2025
General Knowledge
"Leopold von Ranke revolutionized historical scholarship by emphasizing primary sources and objective analysis. His methodology developed in the 19th century prioritized factual accuracy and critical examination of historical documents. Ranke’s approach laid the foundation for modern historiography advocating for a scientific method that influenced historians worldwide. His seminal works such as History of the Reformation in Germany underscored the importance of empirical evidence shaping the discipline’s focus on verifiable data. This rigorous approach remains a cornerstone of historical research ensuring narratives are grounded in authentic records rather than speculative interpretations."
"Fatehpur Sikri a city founded by Emperor Akbar served as the Mughal capital from 1571 to 1585. In 1582 Akbar introduced Deen-e-Ilahi a syncretic religious doctrine blending elements of Islam Hinduism Jainism and Zoroastrianism. This initiative reflected his vision of fostering religious tolerance within his diverse empire. The city’s architectural grandeur including the Buland Darwaza symbolizes Akbar’s reign. Deen-e-Ilahi though short-lived highlighted his innovative approach to governance aiming to unify his subjects under a common spiritual framework with Fatehpur Sikri as its epicenter."
"The Harappa Civilization flourishing between 2600 and 1900 BCE is a hallmark of the Bronze Age in South Asia. This period is characterized by the use of bronze tools urban planning and advanced trade networks. Harappa located in present-day Pakistan featured sophisticated city layouts drainage systems and standardized weights. The civilization’s advancements in metallurgy and urban development reflect the technological and cultural achievements of the Bronze Age. Its decline around 1900 BCE remains a subject of study with archaeological evidence providing insights into its societal structure and economic systems."
"The Mehrgarh Civilization dating back to 7000–2500 BCE is Pakistan’s earliest known Neolithic settlement. Located in Balochistan it marks the transition from hunter-gatherer societies to settled farming communities. Excavations reveal evidence of early agriculture domestication of animals and rudimentary crafts. Mehrgarh’s significance lies in its role as a precursor to the Indus Valley Civilization showcasing advancements in pottery and social organization. Its Neolithic context highlights the region’s contribution to early human development with archaeological findings offering valuable insights into the evolution of sedentary lifestyles in South Asia."
"Initiated in 1819 by Haji Shariatullah the Faraizi Movement was a religious reform effort in Bengal aimed at purifying Islamic practices. It emphasized adherence to fundamental Islamic principles rejecting un-Islamic customs prevalent among Bengali Muslims. The movement gained traction among rural communities advocating for social justice and religious orthodoxy. Under Shariatullah’s leadership and later his son Dudu Miyan it played a significant role in mobilizing peasants against colonial and feudal oppression. The Faraizi Movement’s legacy lies in its contribution to Islamic revivalism and social reform in 19th-century South Asia."
"William Cunnington an 18th-century English antiquarian is regarded as a pioneer in archaeological excavation. His systematic approach to excavating prehistoric sites particularly around Wiltshire England laid early groundwork for modern archaeology. Cunnington’s work on barrows and Stonehenge provided critical insights into Britain’s ancient past. By meticulously documenting findings he set a precedent for scientific excavation methods. His contributions though less celebrated than later archaeologists were instrumental in transitioning archaeology from antiquarianism to a disciplined field influencing subsequent generations of researchers studying ancient cultures and artifacts."
"Ashoka the Great a Mauryan emperor underwent a profound transformation after the Kalinga War’s devastation embracing Buddhism around 260 BCE. Initially a Hindu ruler known for conquests Ashoka adopted Buddhist principles of non-violence and compassion shaping his governance. His edicts inscribed on pillars and rocks across India promoted ethical conduct and social welfare. Ashoka’s patronage facilitated Buddhism’s spread across Asia leaving a lasting legacy in Indian history. His reign exemplifies how personal conviction can influence state policy fostering a legacy of peace and cultural integration."
"Signed in 1215 the Magna Carta was a pivotal agreement between King John of England and rebellious barons. This charter limited royal authority establishing principles of legal accountability and individual rights. It addressed grievances like arbitrary taxation and ensured protections for baronial privileges. The document’s clauses laid the foundation for constitutional governance influencing modern legal systems. By formalizing the relationship between the monarchy and its subjects the Magna Carta became a cornerstone of democratic ideals symbolizing the balance of power between rulers and the governed in medieval England."
"The Out of Africa theory posits that modern humans (Homo sapiens) originated in Africa approximately 200000–300000 years ago before migrating to other continents. Supported by genetic and fossil evidence this hypothesis suggests a single African origin for all human populations replacing earlier hominid species like Neanderthals. Archaeological findings such as those in Ethiopia’s Omo Valley corroborate this model. The theory underscores Africa’s central role in human evolution highlighting the migratory patterns that shaped global human diversity. Ongoing research continues to refine our understanding of these ancient movements."
"Sir John Marshall as Director-General of the Archaeological Survey of India led the 1920s excavations that revealed the Indus Valley Civilization. His work at sites like Harappa and Mohenjo-Daro uncovered a sophisticated urban culture dating to 2600–1900 BCE. Marshall’s systematic approach identified advanced city planning sanitation systems and trade networks reshaping understanding of South Asia’s ancient history. His findings highlighted the civilization’s cultural and economic complexity establishing it as a cornerstone of early urban development. Marshall’s legacy endures in the continued study of this Bronze Age civilization."
"Archaeology examines past human societies through material remains such as tools pottery and structures. By analyzing these artifacts archaeologists reconstruct ancient lifestyles economies and cultures. The discipline spans prehistoric and historical periods employing techniques like excavation and radiocarbon dating to uncover evidence. From Stone Age tools to medieval settlements archaeology provides insights into human development across millennia. Its interdisciplinary approach combining history anthropology and science ensures a comprehensive understanding of past things preserving humanity’s heritage and informing our knowledge of societal evolution across diverse civilizations."
"Sirkap Palace part of the ancient city of Taxila in Pakistan was a significant center of Hellenistic and Indo-Greek culture. Established around the 2nd century BCE Taxila was a hub of learning and trade blending Persian Greek and Indian influences. The palace excavated in the 19th century reflects sophisticated urban planning and architectural styles. Taxila’s UNESCO World Heritage status underscores its historical importance with archaeological remains revealing insights into ancient education religion and commerce making it a key site for understanding cultural interactions in South Asia."
"Zulfikar Ali Bhutto became Pakistan’s first Civilian Martial Law Administrator in 1971 following political turmoil. As president he navigated the country through the aftermath of the Bangladesh Liberation War implementing reforms to stabilize governance. Bhutto’s leadership saw the introduction of the 1973 Constitution a landmark in Pakistan’s political history. His tenure marked by nationalization policies and social reforms shaped modern Pakistan’s political landscape. Despite controversies Bhutto’s role as a civilian administrator during martial law remains a pivotal moment in the nation’s efforts to balance democracy and stability."
"Firdausi a 10th-century Persian poet composed the Shah Namah an epic chronicling Persia’s history and mythology. Commissioned by Mahmud Ghaznavi a prominent ruler of the Ghaznavid dynasty this work was completed in 1010 CE. The Shah Namah blends historical narratives with legendary tales preserving Persian cultural identity. Firdausi’s masterpiece crafted in Mahmud’s court reflects the era’s literary and political patronage. Its enduring influence lies in its role as a cornerstone of Persian literature inspiring generations with its vivid storytelling and cultural significance."
"The first Punjab Assembly election in Pakistan held in 1951 marked a significant step in establishing democratic governance post-partition. Conducted four years after the 1947 independence it reflected efforts to organize provincial governance amidst political and social challenges. The election facilitated the formation of a legislative body responsible for regional administration shaping Punjab’s political landscape. This milestone underscored Pakistan’s early democratic processes laying the groundwork for subsequent electoral systems. The 1951 election remains a key event in understanding the nation’s transition to self-governance following colonial rule."
"Prehistoric archaeology investigates human societies before written records focusing on cultures without textual documentation. This field examines artifacts tools and settlements from periods like the Stone Age to understand early human behavior and societal development. Techniques such as stratigraphy and radiocarbon dating help reconstruct timelines and lifestyles. By studying material remains prehistoric archaeology reveals insights into ancient technologies economies and social structures offering a window into humanity’s origins. Its focus on pre-literate societies distinguishes it from historical archaeology which relies on written sources."
"Pakistan’s Senate ensures equal provincial representation with each of the four provinces—Punjab Sindh Khyber Pakhtunkhwa and Balochistan—allocated 23 seats. This structure established under the 1973 Constitution balances regional interests in the federal legislative framework. Senators elected by provincial assemblies serve six-year terms with half the seats renewed every three years. This system promotes equitable representation addressing diverse provincial concerns within Pakistan’s bicameral parliament. The allocation of 23 seats each underscores the Senate’s role in fostering national unity and legislative equity across Pakistan’s diverse regions."
"Amir Khusrau a 13th-century Sufi poet and musician is credited with developing the Khayal music system a cornerstone of Hindustani classical music. This improvisational vocal style allows performers to explore melodic and rhythmic creativity within a raga framework. Khusrau’s innovations rooted in Persian and Indian musical traditions enriched South Asian cultural heritage. His contributions including compositions and poetic works bridged diverse cultural influences shaping the evolution of classical music. The Khayal system remains a vibrant tradition celebrated for its expressive depth and artistic flexibility."
"Islamabad was declared Pakistan’s capital in 1961 under Field Marshal Ayub Khan’s leadership. Designed as a planned city to replace Karachi Islamabad was strategically chosen for its central location and climate. Construction began in the 1960s with Greek architect Constantinos Apostolou Doxiadis leading the urban planning. This decision reflected Ayub Khan’s vision of modernizing Pakistan’s administrative infrastructure. Islamabad’s development as the political and administrative hub continues to symbolize the nation’s aspirations for progress and unity with its layout emphasizing functionality and aesthetic harmony."
"The cerebrum comprising about 85% of the brain’s mass is the largest part of the human brain. It is divided into two hemispheres each controlling various cognitive and motor functions. The cerebral cortex its outer layer handles complex processes like reasoning language and memory. Responsible for voluntary actions and sensory processing the cerebrum plays a central role in human consciousness. Its intricate neural networks facilitate higher-order functions distinguishing humans from other species. Neuroscientific research continues to explore the cerebrum’s role in shaping behavior intelligence and emotional responses."
"Shah Waliullah Dehlawi an 18th-century Islamic scholar authored 51 books significantly influencing South Asian Islamic thought. His works including Hujjatullah al-Baligha addressed theology philosophy and social reform blending Persian and Arabic scholarship. Waliullah’s writings sought to reconcile Islamic principles with contemporary challenges promoting intellectual revivalism. His translations particularly of the Quran into Persian made religious texts accessible to a broader audience. These 51 works remain foundational in Islamic studies shaping religious discourse and inspiring movements for reform and unity in the Indian subcontinent."
"The Constitution of Medina established by Prophet Muhammad in 622 CE is often called the Magna Carta of Islam. This treaty outlined a framework for coexistence among Muslims Jews and other tribes in Medina defining rights and responsibilities. It established principles of mutual protection justice and religious freedom fostering a unified community. As a foundational document it set a precedent for Islamic governance emphasizing social harmony and legal equity. The Constitution of Medina remains a critical reference for understanding early Islamic political and social organization."
"In 693 CE Umayyad Caliph Abdul Malik ibn Marwan introduced the dinar a standardized gold currency marking a significant reform in Islamic economics. Replacing Byzantine and Sassanid coins the dinar featured Arabic inscriptions and Islamic motifs symbolizing cultural and political independence. This currency facilitated trade across the expanding Islamic empire ensuring economic stability. Abdul Malik’s monetary reforms centralized financial systems enhancing administrative efficiency. The dinar’s legacy endures in modern currencies reflecting its historical role in shaping economic policies and fostering commerce in the early Islamic world."
"Sultan Alp Arslan a 11th-century ruler led the Seljuk Dynasty to prominence notably through the 1071 Battle of Manzikert. His leadership expanded Seljuk influence across Central Asia and the Middle East establishing a powerful Turkic empire. The dynasty known for its patronage of art and architecture blended Persian and Islamic traditions. Alp Arslan’s military and administrative achievements strengthened Seljuk governance influencing subsequent Islamic empires. The Seljuk Dynasty’s legacy lies in its cultural and political contributions shaping the medieval Islamic world and facilitating cross-cultural exchanges."