“I gave her all the money ___ I had.”

"In the sentence “I gave her all the money that I had” “that” is a relative pronoun introducing a restrictive clause specifying the money given. It connects the main clause to the descriptive clause ensuring clarity. Proper use of relative pronouns like “that” is essential in English grammar for constructing precise cohesive sentences. This structure is common in academic and professional writing enhancing clarity and specificity in communication particularly when defining objects or concepts in complex sentences."