Here's why this is the climax:
* High Stakes: Ramona has been struggling with feeling ignored and overlooked. This act, done out of a desire to prove herself and be seen as responsible, carries high stakes for both Ramona and Roberta's safety.
* The Turning Point: This event forces Ramona to confront the consequences of her actions and the danger she put herself and her sister in. It's a pivotal moment that highlights the theme of growing up and learning responsibility.
* Emotional Impact: The climax is emotionally intense, filled with Ramona's fear, regret, and ultimate realization that her actions were wrong.
While the book continues after this event, it marks a turning point for Ramona's character. It's the moment she learns a valuable lesson about responsibility and the importance of listening to her parents.