Mesopotamia (the Tigris and the Euphrates), India (the Indus and the Ganges), China (the Huang-ho and the Jang-tze).
The first river valley civilization was Mesopotamia, located in Asia. Asia has had the most river valley civilizations.
A river valley is near a river and provides the necessities for stable life style to occur due to fertile lands. It is where civilizations first started in the world. Example, Mesopotamia.
Danube River Valley
Upon which river were the Harappan and Mohenjo-Daro civilizations founded
Tigris, Euphrates River Valley's and Los Angeles
irrigation
yellow river valley
Democracy
The Nile River was the axis of two early African civilizations
Vast Empires
They had to sale the slaves from africa in order to get more gold and more food in order to survive
The geographic factor that was most important to the development of the early river valley civilizations would be the river. This is because it gave them fertile soil to grow crops.