To prove Hess' theory of seafloor spreading, divers and submarine drones have gone into ridges and have discovered the following . a) the trenches are moving
b) marine life
c) molten material at the bottom of the trench, meaning new rock formation
d) molten material far away from the trench meaning old rock formation

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.

pv=nrt

explanation: