Which statement BEST describes the author's point of view about energy use? a People will need to learn how to use technological trends and developments. b People will need to actively support the total use of alternative energy sources. c People will need to make hard choices about the country's energy policies. d People will need to know that their energy efficiency efforts are not always helpful.

a chemical reaction

explanation:

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

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.

if you're asking what comes out, it's steam.