Answer:
Elie Wiesel refers to the dead as "bodies" to show how dehumanized they've become, not worthy of being called or even referred to a "human or people" or a sensible normal human being. It may also be his way of indirectly referring to the treatment the officers gave them.
Explanation:
Elie Wiesel's autobiographical memoir "Night" recounts his life during the German Nazi's discrimination against the Jews. The resulting horrors of the Holocaust remain one of the most gruesome genocides in the history of the world.
In his description of how the Jews were transported from Auschwitz to Buchenwald, Wiesel narrates how many died on the train journey between the two concentration camps. He recounts how these "dead bodies" were discarded from the train "like a sack of flour". By referring to the dead as bodies, it shows how they were dehumanized, not even considered "human" or "people". To the officers, it seems like they are just simply living beings that had died and done, Jews as being lesser than humans, etc. The reference shows the low status of the Jews in the eyes of the officers. It shows the dehumanized nature or treatment of the Jews.