Question

what is the importance of river in the early settlements in history question

Answer 1

During the period of the early humans, river was the only source of water, but today it has changed by borewells, wells, city supply, etc.

Answer 2

River valleys are most fertile region and the first human settlement were all done to do agriculture. The fertile soil in these regions were best suited for agriculture. Hence people first settled near river valleys.
or
Resources were rich around river valleys...water food etc and they could live inside d jungle near the river