Why does the author most likely include this plot detail

Who is ¨ the guilty party¨ at the end of the text, and how do his actions contribute to the storys theme?

List some things you like to do with ur close friends and everyday friends(school)

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