Population
(How many people lived here and where did they live?)
Indus River Valley - today

federal power is further limited with a system of checks and balances that gives each branch of government a measure of power over the others.

explanation:

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.

the answer is prolly b