Well the short answer is, unlike the christians who would force conversions, the muslims were very tolerant of other conquered peoples and allowed them to continue practicing their beliefs as long as they paid a tax
They imported slaves as a part of the Transatlantic Slave Trade. They used a system of triangluar trade to do so.
The Indus people used water from rivers for multiple purposes, most notably for: religious ceremonies, drinking water, wash themselves, properly treat their fields, etc. The original Indus farmers preferred to live near rivers and or any body of water, simply because the water would better keep their land healthy and grass greener. It was also amazing for growing select crops.
This is wierd bc i think you can rember things when ur on cocaine im not sure tho