Rereading. Or looking up unknown words.
The author's main purpose of writing memoir Night was to describe the terrible conditions of war.
Explanation: The author has described about the inhumanity to nature when the war has took place. The crying night souls of the people are expressed in the poem where they starve for happiness and peace.
It would be the level of the river rose last. I belevie it is intransitive but i could be wrong.