What do you think was the most important reason that Communism appealed to the
Russian people? (easy to understand pls, i am really bad at history)

The most important reason is that the Communism meant the division of land, which until then was totally in the hands of rich Russian landowners.

Explanation:

Most people in Russia, especially peasants were poor. They had no belongings and had to work on the farms of Russian landowners. Communism offer them distribution of land and end of war, during which Russia suffered the most. That is why many people accepted to join the Red Army.

the best description of postwar writers might be progressive.

following the war, writers showed a tendency to work on artistic or social matters rather than political themes. while postwar literature may not have been the greatest period of english literature, the themes provided excellent critics a high number of novels. such examples include anthony burgess, anthony powell and frank kermode, all of which can be placed under the progressive view.