I think the answer is Im worried because I havent heard from you in a while. Hope this helps!
The theme is the message that an author is trying to get his or her readers to understand. For example, in the Greek myth of Daedalus and Icarus, the theme was "don't be prideful". Because Icarus and Daedalus violated this by trying to act like the gods, they were punished: Icarus fell into the ocean and drowned.
Okay, I know this. It has to be "The fact that Northern opinions of slavery can be hypocritical"
The author wanted to have people see themselves in Miss Ophelia so that they could reconsider their views on slavery.
I hope this helps some! :)