Gender agreement means using the correct pronoun to match whether the antecedent is masculine, feminine, or neutral. For people, we use "he/his/him" for males and "she/her" for females. For objects and animals, we typically use "it/its."
Consider this example: "Maya packed her camera while Leo gathered his warm jacket." The feminine pronoun "her" correctly refers to Maya, while the masculine pronoun "his" matches Leo. This demonstrates proper pronoun-antecedent agreement gender.