Match each item to the time it best represents. late 1960s
1. humans began using stone tools
birth rates declined, and the average life expectancy
2.
increased

Paleolithic Era
3. the world population totaled six billion people
Industrial Revolution
4. the annual population growth rate reached its peak
1999

they had more african americans than any other state.

hope this , have a good day. c;

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.

there were 6 major base camps.   the base camps were located in alva, fort reno, fort sill, the madill provisional internment camp headquarters, mcalester and camp gruber.

use wikipedia, i think they have this.