Around how many people in Africa are of Arab origin? *

If a population is growing quickly in a small area then what must increase as well

Yo! a girl out ! i will give brainliest! hu one of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.

Where the main factor that enabled the growth of cities and civilizations was the existence of