What does it mean to say that “atoms are not created or destroyed” in a chemical reaction? Explain how this relates to products and reactants in a chemical reaction.
Explain how this demonstrates conservation of mass in a chemical reaction.

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.

it is b that is the answer.