Answer:
Life is based on carbon; organic chemistry studies compounds in which carbon is a central element. The properties of carbon make it the backbone of the organic molecules which form living matter. Carbon is a such a versatile element because it can form four covalent bonds.
Explanation:
Answer:
<em><u>The water cycle describes how water evaporates from the surface of the earth, rises into the atmosphere, cools and condenses into rain or snow in clouds, and falls again to the surface as precipitation. ... The cycling of water in and out of the atmosphere is a significant aspect of the weather patterns on Earth.</u></em>
The answer is B, because layers mix better at the poles.
I think number one is Strongly Linked and the second one is Less Linked. Hope this helps. If it's wrong sorry
Answer no 1 is correct :)