This archaeological culture group was the first to use early forms of irrigation over 8,000 years ago, spurred by their relocation to more arid land. a. Samarra
b. Ubiad
c. Mesopotamians
d. Uruk

Samarra

Explanation:

answer; /// during daylight hours the sun heats up the ground,and at night the clouds insulate the warmth making it warmer ;

doctrine that the us had the right to expand throughout north america.