Jem is proud of atticus because

atticus is a great shot
atticus is decent and humble
atticus saved the neighborhood
atticus is old

Explanation:

As the story advances, Jem and Scout start to see their father from an alternate perspective. When he shoots the out of control puppy, Jem and Scout are awed. They had no idea that their father was a sharpshooter.

This is an instance that alters their perspective on their father being old and weak. Rather, they consider Atticus to be a hero. They appreciate his shooting abilities.

a

explanation: