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

This is what i found on google “eightin 1997, the mccaughey septuplets were born in carlisle, iowa. multiple births of as many as eight babies have been born alive, the first set on record to the chukwu family in texas in 1998; one died and seven survived. in 2009, a second set, the suleman octuplets, were born in bellflower, california.” i was surprised about this . i don’t want to have that many babies .

S^2 = a4^2 = a4 * 4 = a16 centimeters = area of the square