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! :)
This would be called infraspecific competition, or a food web.
This phenomenon is also called Rainforest competition, and it exists on every level, from the big cats (tigers, jaguars and leopards) and anacondas that usually hunt small mammals to the birds and amphibians that go after the same fruit, nuts and insects.
Number three is the answer