In The Boy in the Striped Pajamas, how did Bruno's life change from moving to Auschwitz from Berlin?

Bruno's life dramatically changes when he moves from his lovely, five-story home, "if you
include the basement," in Berlin to Auschwitz, which Bruno refers to as Out-With. In
Auschwitz, Bruno does not have his three best friends to play games with, and there are no
bustling town streets to walk up and down. His new home at Auschwitz is significantly smaller,
uncomfortable,...