During the Middle Ages this group of people were not allowed to leave the land on which they lived and worked? is it slaves or serfs or peasants?​

I would guess slaves.

Explanation:

Slaves are different from servants, which could probably come and go. Servants were hired and paid to work for someone. Slaves were made to work and their "owners" would sometimes torture them if they didn't do something perfect.

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.