For me is
Answer:
Civilizations developed in areas well suited for agriculture but relied on trade for everything.
Explenation :
Examples of early river valley civilizations include the Indus Valley Civilization, Ancient Egypt (on the Nile), Mesopotamia (along the Tigris and Euphrates Rivers), and Chinese civilization along the Yellow River. The Indus River's source is in the Himalayan mountain range on the Tibetan P.
Thats what I know.