Farmers may have moved to the Indus Valley from the Bolan River area . 1.because they wanted to build great cities
2.because the Bolan River dried up
3.because it had a plumbing system
4.because their gods told them to

im gonna go with the bolan river dried up

Explanation:

no where does it say it dried up completely but it did dry up plus it said that farmers moved there because of the soil and how quick it was to farm because the indus valley had lots of water

answer: karl marx, max weber, and emile durkheim (the fourth could be considered georg simmel)

explanation:

hhebeueubevcje. he. me. e beben