What is the purpose of a hook in an introductory paragraph?

My friends asked me, “are you not coming for the party? "change into passive voice

The speaker in “the courage that my mother had” is a daughter friend grandchild mother

The reader can conclude that the sniper is because a. human, he feels conflicted about the old woman. b. intelligent, he has the face of a student. c. daring, he lights a cigarette even though it is dangerous. d. athletic, he has survived until now.