Final answer:
In chapter 4 of the book, Elie loses his family and his faith.
Step-by-step explanation:
In chapter 4 of the book, Elie loses two things: his family and his faith. This chapter describes the tragic separation of families in the concentration camps of the Holocaust, as Elie is separated from his mother and sisters. Additionally, Elie begins to lose his faith in God as he witnesses the horrors of the Holocaust.