65th B.P.S.C. (Re-Exam) (Pre) 2020
Which of the following activities increases oxygen in the carbon cycle occurring on Earth?
aRespiration
bVolcanic eruption
cDecay of organic matter
dPhotosynthesis✓ Correct
eNone of the above/More than one of the above
Explanation
In the process of photosynthesis, water and carbon dioxide are used and oxygen is released. Therefore, in the carbon cycle on Earth, photosynthesis increases oxygen.
general-science