Answer:
As there are certain examples or scenes inside which the narrator tells or executes a flash backs for the better understanding of the audiences.As the people want to know more about a certain aspect of the story or event. Same is the case for this one, which is "The Killing a Mockingbird".
As the narrator starts from giving more valid information about the situations faced by the individuals who is living in the Southern region. While, at some instants we get to know that the narrator himself is the child inside the novel, while he himself contributes to adding more and more information for the better understanding of the audiences or we can say that of the leader.
