Answer:
A. increased; Great Migration
Explanation:
When the migration began, 90 percent of all African-Americans were living in the South. By the time it was over, in the 1970s, 47 percent of all African-Americans were living in the North and West. A rural people had become urban, and a Southern people had spread themselves all over the nation.
Answer:
I'm no paleontologist but my answer would be:
Throughout time the tectonic plates slowly shift. This causes certain things fossil or not to be in landmasses thousands of miles away.
temperature and amount of rainfall
