What is an opposition on page 40 of Night by Elie Wiesel

N the blizzard and the darkness, the prisoners from Buna are evacuated. Anybody who stops running is shot by the SS. Zalman, a boy running alongside Eliezer, decides he can run no further. He stops and is trampled to death. Malnourished, exhausted, and weakened by his injured foot, Eliezer forces himself to run along with the other prisoners only for the sake of his father, who is running near him. After running all night and covering more than forty-two miles, the prisoners find themselves in a deserted village.