Why do stories include exposition?

Does anyone read this story in 9th grade "when mr. pirzada came to dine"

25 ! which three lines in this excerpt from phillis wheatley's poem "goliath of gath" contain examples of figurative language? the hosts on two opposing mountains stood, thick as the foliage of the waving wood; between them an extensive valley lay, o'er which the gleaming armour pour'd the day, when from the camp of the philistine foes, dreadful to view, a mighty warrior rose; in the dire deeds of bleeding battle skill'd,

What is the climax of chapter 2 of the the sound and the fury? a. the compsons sell their plot of land to send quentin to harvard. b. quentin drops out of school. c. quentin commits suicide. d. caddy gets pregnant.