What sea forms africa northern border

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.

Can someone answer all these questions i need it done by tonight. once again

What is meant by the term relative location?