Here's how:
* Bruno's curiosity and desire to help Pavel: Bruno feels sorry for Pavel, who is treated poorly by the guards and works tirelessly in the "farm". He wants to help him, which drives his interest in the "farm" and ultimately leads to him crossing the fence.
* Pavel's inability to warn Bruno: After Bruno crosses the fence, he is unable to communicate with Pavel due to the language barrier and the fact that Pavel is forbidden to talk to the children. This means that Pavel can't warn Bruno about the dangers of the "farm".
* Pavel's role in the final scene: Pavel is present in the gas chamber, but his role is unclear. It's possible he witnessed Bruno's death, but this is never explicitly stated. However, his presence contributes to the tragic atmosphere of the scene.
In essence, while Pavel doesn't directly assist Bruno after the accident, his presence in Bruno's life sparks the boy's curiosity and ultimately leads to his tragic fate. The novel highlights the devastating consequences of prejudice and ignorance, and the importance of empathy and communication in the face of injustice.