In the middle east, which of the following bodies of water is an important source for freshwater and irrigation to many who live in the region?

You have not given options for the answer to this question, but one notable source of water in the area include the Tigris and Euphrates Rivers (which were important for freshwater and irrigation back in the babylonian days). Other sources of water include the Red Sea, the Suez Canal and the Persian Gulf.

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.