It’s actually not any of those it’s osmotic flow of water :)
They grow foods and tends livestock to provide for a family
c.polluting a river because u are contaminating the water
B. The rivers were used to sustain life by growing crops and food and having an unlimited drinking supply.
Answer:
The earth rotates once every 23 hours, 56 minutes and 4.09053 seconds, called the sidereal period, and its circumference is roughly 40,075 kilometers. Thus, the surface of the earth at the equator moves at a speed of 460 meters per second--or roughly 1,000 miles per hour.