What does the author structure the text in chapter 3

I'm not sure what you mean by structure. The narrative in chapter 3 is consistent with the rest of the book. In this section, Eliezer and the other prisoners are fully exposed to the horrible inhumanity of the Nazis. Due to the brutal methods of the Nazis, they are transformed from respected individuals into obedient, animal-like automatons. How does this transformation take place? When the prisoners first arrive at the camp, some of the young men want to rebel: "We've got to do something. We can't let ourselves be killed. We can't go like beasts to the slaughter. We've got to revolt." Despite these early feelings of rebellion, the prisoners rapidly become docile and fearful, and they follow the rules set out by the Nazi authorities. Why do they obey people who are so obviously intent on destroying them?