The answer is Nitrogen fixation
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The body actually performs cellular respiration continuously. The correct option among all the answers that are given in the question is the third option or option "C". The other options that are given are wrong and so can be avoided. I hope the answer has actually come to your help.
Is there supposed to be an image?
The smoke increases effectively increasing the planetary albedo, forcing is less however and tends to be insensitive to the solar geometry