Because the people had clean water, a good place to grow crops, and if they had boats they had transportation.
sumer
Mesopotamia Indus river valley Niger river valley Andes mountains Chinese river valley
The fertile silt made the land ideal for farming.
The Indus River Valley is the longest river in Pakistan.
Ganges River valley
sumer
the yellow river valley is an important farming area to china
the name of it is UR
newdiv
longest river in Indian sub continent
Danube River Valley
A river valley forms from a river from the river going into a valley
Because people can eat there and have fun.
The Hwang Ho is a very large and important river in China.
river valley is a river and a valley, like if a long stream of a river that is all i can say people.
Mesopotamia Indus river valley Niger river valley Andes mountains Chinese river valley
Huang He Valley and The Yellow River