These essays are intellectually ___ represent various levels of complexity

The word "demanding" indicates that the essays require significant intellectual effort due to their complexity fitting the sentence best. "Superior" "revealing" and "modern" don’t align with the context. Vocabulary precision is crucial for academic writing or professional communication. Choosing the right adjective ensures accurate description especially in critiques or reviews. This skill enhances clarity in describing content like essays or reports particularly in academic or professional settings where conveying the nature of material is important for impact and understanding.