Question

The river valley civilizations used their local bodies of water to expand their power by?

Answer 1

Answer:

The river valley civilizations used their river to flourish there civilization as well for farming and trading purposes.  The local bodies of water provided a transporting system which helped the civilization in transporting goods as well as for importing and exporting. The river civilizations were all water monopoly empires that maintained power and control over access to water.  

 

Answer 2

Transporting goods over long distances", since this was far easier and cheaper than transporting goods over land.