In a piece of fiction, the exposition portion of the plot provides -an introduction to the main character? -an exciting turn of events? -important details in wrapping up the story? -foreshadowing?

Ineed to write a write a 4–5 paragraph compare and contrast essay that addresses how anne frank matures over the course of writing her diary.it's also a compare and contrast essayi just got put into this new class and i don't know if we were supposed to already be reading and the essay is due today and i haven't even started it nor read the book, someone me what do i do