The climax of the novel To Kill a Mockingbird is when all conflict is finalized. This moment is when Arthur (Boo Radley) defends the Finch siblings from Bob Ewell's knife attack by killing him (Lee 302). At this moment, the conflict of Bob Ewell's violent tendencies and grudge against Atticus are solved. The children's conflict of wanting to see Boo Radley is also solved. This scene turns the story on its heels and is the moment of highest drama.
The resolution of the novel is when all loose ends are tied up. In this case, loose ends are tied up when the Finch siblings return to the house. Jem is sleeping off his injuries and Scout is finally able to speak with Boo Radley face-to-face (Lee 311). Atticus decides to let Jem go to court for the death of Bob Ewell (Lee 314). The novel ends with a sweet moment between Atticus and Scout, who are sitting in Jem's room reading while he sleeps. The story is about a boy who was chased and harassed, only to be discovered to be a nice person (Lee 323). This mirrors the children's endless pursuit of Boo and ends the story on a nice note.
The tone of the novel To Kill a Mockingbird is initially nostalgic and innocent, but as the story progresses and the narrator (Scout) ages, the tone of the novel becomes more knowing and introspective. The tone of the novel is nostalgic when Scout describes her childhood adventures with Jem and Dill. The way their backyard adventures are described implies nostalgia for the "good times." For example, it states in the novel, "Somehow, it was hotter then..People moved slowly then" (Lee 6). This quote creates a reminiscent tone and the reader can tell that Scout views the days of her youth as days of golden joy. In contrast, at the end of the novel, the tone becomes more knowing as Scout matures. In the text, it states, "...At the same time I marveled at Atticus. This was the first he had let us know he knew a lot more about something than we thought he knew" (Lee 278). This was the first time that Scout realized that her father was actually wiser and knew about more things than she thought. This is a moment where Scout matures and gains knowledge. She is no longer innocent and unknowing in her tone by the end of the novel.