Answer:
There are three main themes of “To Kill a Mockingbird”: The Coexistence of Good and Evil: The novel shows the reader the transition of Scout and Jem from innocent children, when they assume that all people are good, to a more adult perspective where they encounter evil, prejudice and hatred.
Explanation:
Got it from google... hehe. Hope this helps! ^-^
C. II and III- both of these can be reasons on why an author would use description to advance a piece of writing.