Answer:
He is fascinated by Stargirl's unusual behavior, and eventually gets close to her and enters into her world. He also feels the pull to be normal, and he tries to help Stargirl understand that. Leo is more self-aware than either Stargirl or his high school peers. He analyzes the behavior of the group toward Stargirl.
Explanation:
I love this book
B. Overgeneralization
They are saying that "practically every teen cares" but have no real evidence to back that up. They may have polled a small group of teenagers and because the majority of them said they care about animals they generalized that information to represent everyone in the age group. Without a full poll or teens there is no way to know how many do or do not care about the welfare of animals.
