A(n) is warm moist air that allows for storms. high-pressure system
pressure belt
warm front
low-pressure system

Which of the following best describes the economy of africa?

Can someone me? i need to have this done as soon as possible! i'm putting 20 points on this!

Acivilization exists for several hundred yeaars, developing its own language. such a civilization probably has been: a. farming corn b. suffering from a lack of contact with the outside world. c. isolated by mountains or some other physical barriers. d. starving from lack of trade.