What are the answer choices? Audience and purpose sound like they could fit.
The theme of the poem is basically the American Discrimination. Discrimination is basically is a term which is used to define the difference b/w two groups on the base of some qualities etc. For example the American Discrimination was between black and white people.
Umm... not quite sure what you're looking for... but a theme of <em>To Kill A Mockingbird</em> is racial prejudice because the whole reason Tom lost his case is the fact that he was a black man; it was open-and-shut really.
