Area of first ovilizations Desert
How did rivers contribute most to making the shaded area on this map the
location of the first human civilizations?
A. Barges provided a way to carry goods to market, creating a motive
to increase production.
B. The social organization required to build irrigation canals gave rise
to a social hierarchy.
O C. Fishing added protein to the diet, increasing life expectancy as
well as people's size and strength.
D. Floods deposited rich silt over the land in a soil-building process