Clear because there is the sun
Atmosphere and Hydrosphere are the answer. The atmosphere is a layer of gases that surrounds in the planet or other material inside the body that is held in place by the gravity of that body. There is also Atmosphere in earth or what we called Air, it is also a layer of gases. It is the whole mass of air that surrounds the earth so that we can breathe freely. Earth atmosphere contains 78% nitrogen, 0.9% argon, 21% oxygen and 0.03% carbon dioxide. Hydrosphere in the other side is all the water on the earth’s surface example are lakes, seas and sometimes including water over the Earth’s surface like clouds.
it needs 40 feet for the carpet.
hope this helps
its obviously not child labor or economy based because those have nothing to do with the environment so its the other three.
D - Allow pH to change drastically.
The reason that we have buffer in our system is to protect AGAINST sudden change of pH
