The exchange is dialogue. The two characters are talking to each other--not themselves or the audience directly.
Well you start a paragraph with an open ending question so ask about the character then answer that question and do the same for the other one and then compare or explain why they are the main characters and how they contribute to the book
The story Old Yeller by Fred Gipson is a realistic fiction book. It tells about a fourteen year old boy named Travis who was left in charge of his family and the farm while his papa was away on a cattle drive. One day an old yeller dog shows up and steals some meat and wrecks the fence.