Why were the first civilitations near river-valleys.?

The zhou controlled the area to the east of the shang kingdom true or false pleas

How were the okanogan highlands formed? a. by subduction, which caused huge folds in earths surface b. as a result of retreating glaciers carving great valleys into the earth c. when molten rock from under the earth approached the surface d. when the collision of volcanic island chains and ocean rocks formed new earth

What issues are reporters presently working to expose and reform?