What is the big decision that Eliezer and his father have to make when they leave Buna?

The significant decision that Eliezer and his father face when leaving Buna revolves around whether to go to the hospital or stay with the group. This choice highlights a critical moment of survival and loyalty. Eliezer is faced with the prospect of remaining in a place that offers medical attention, which is essential given the dire conditions they are enduring, but he is also mindful of the implications of separating from his father and the group.

Choosing to go to the hospital would mean prioritizing health over the uncertain safety of continuing with a group that might face harsher conditions outside the ghetto. This dilemma reflects the larger themes of familial bonds and the struggle for survival in the face of overwhelming adversity during the Holocaust.

The other options do not accurately capture the central conflict Eliezer and his father experience at that moment. The focus on hospital versus group encapsulates the emotional weight of their decision-making process amidst the chaos of their situation.