Why doesn't Eliezer want his father to fall asleep when the prisoners are finally allowed to rest on the march?

Eliezer's concern for his father revolves around the harsh and brutal conditions they are enduring during the march. When prisoners are permitted to rest, it is dangerous for them to fall asleep due to the extreme cold. If his father fell asleep, he could be at risk of freezing to death, given the severe temperatures they faced without proper clothing or shelter. This highlights not only the physical challenges they are confronting but also the deep bond of care and responsibility that Eliezer feels for his father, as he is aware that sleep could lead to dire consequences in such an environment. Hence, this option reflects the life-threatening reality of their situation.