A broad, marshy, triangular area of land formed by silt deposits at the mouth of a river.
I took notes about this a long time ago
Answer:
The option C would be a true statement
There are four settled societies that each developed agriculture independently along major rivers that are traditionally considered the early river valley civilizations. The are the Mesopotamian civilizations, the Nile River civilizations, the Indus River civilizations, and the Yellow and Yangtze River civilizations.
I think how long and how often.
