What figure of speech is used in this line from walt whitman's poem "i hear america singing"?

i hear america singing, the varied carols i hear

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