Became suitable sites for new civilizations like mesopotamia because they provided arable land and sources for irrigation. a. coastal plains b. mountainous regions c. tropical forests d. river valleys

The correct option is D

Mesopotamia (land between rivers) is the name by which the zone of the Near East located between the Tigris and Euphrates rivers is known, although it extends to the fertile zones contiguous to the fringe between both rivers, and that approximately coincides with the non-desert areas of present-day Iraq and the boundary zone of northeastern Syria.

D

Explanation:

On Edge 2021

1. ford: gerald ford´s presidency, from 1974 to 1977, faced high inflation, named it public enemy nº1, and created the win program (whip inflation now).

2. carter: president from 1977 to 1981, carter had controversial poitions over abortion, but yet, he enforce the roe vs wade decision, which had pro-choice content.

3. reagan. for his eloquency and powerful speeches in his mandates, from 1981 to 1989, reagan earned this nickname, “the great communicator” .

4. george h w bush: despite many presidents had important roles in managing and trying to end the cold war, it was in bush sr's mandate that the berlin wall was materially destroyed, and he was visited by gorbachev in the uspresident from 1989 to 1993.

5. clinton: defense of marriage act. clinton signed this controvesial act, which defined marriage and spouses in strict heterosexual perspective, that was later declard unconstitutional by the us supreme court.

6. george w bush: in the begining of his presidency, which lasted until 2009, bush jr faced the greatest terrorist attacks in us and probably the worlds history, in september, 11 of 2001.

7. obama: in attempts to cease a great economical crisis, barack obama signed the controversial recovery act in february 2009, which handled 780-billion dollars.

the answer is a. harriet tubman was a nurse on the battlefield.