How does groundwater cause erosion and deposition?

It is reasonable to assume that nations with a low total fertility rate (tfr) and a modest amount of population growth are in

The earth rotates on its axis and revolves around the sun every

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.