How did rivers affect the interaction between prehistoric groups?

a. they protected groups from invasion.
b. they invited interaction with other regions.
c. they kept groups separate most of the time.
d. they let groups divide and form unique cultures.

Go to one of the news sites listed below or another site of your choice and find an article about acts against humanity that are being committed somewhere in the world today. write a paragraph as if you were reporting it to the world. be sure to include the 5 w’s: who, what, why , when, and where, and how. put the source