The correct answer among all of the given choices would be the third choice, CLOUDS.
I hope this is the answer you were looking for and that it helps!! :)
The answer is chemical work. A chemical work happens when a substance is chemically digested or when it is already broken down due to chemicals. An good example for this<span> is building large molecules such as proteins.Chemicals break ATP bonds to another molecule.</span>
Earth's atmosphere is 78%<span> nitrogen </span>21%<span> oxygen, </span>0.9%<span> argon, and </span>0.03%<span> carbon dioxide with very small percentages of other elements.
hope it helps</span>