How did rivers help establish human settlements in Africa? Available fresh water allowed people to grow food.
O Only people who lived near water could trade.
O The amount of water determined how many people could live in an area.
O Available fresh water allowed people to live in remote deserts.

What is the columbian exchange? o a. the changes that resulted from europeans settling in the new world b. the relationships that columbus and his men had with the natives they met o c. the ships that columbus bought with money from the king and queen of spain o d. the increase in the number of native american towns in the new world