What role reversal took place during the final illness of eliezers father in the book night?

During Eliezer's father's final illness in the book Night, there was a role reversal where Eliezer had to take care of his father instead of the other way around. Eliezer became more like a caretaker, providing his father with food, water, and encouragement, which was a stark contrast to their roles at the beginning of their time in the concentration camps.