Answer:
The pivotal moment for Ponyboy from the novel The Outsiders comes at the end, when he´s asked by his teacher to write something important to him and he decides to write about his experience throughout the novel, in the hopes to be able to help others in similar situations.
Explanation:
This event shows that he has learned from the violence he was subjected to, and from his own mistakes. He seems to understand how unfair the death of the Socs' member as well as the eath of the two Greasers were. He finally feels like he has found his place in the world, something he didn´t have at the beginning of the story.