a
Putrefaction
b
Photosynthesis
c
Volcanic eruption
d
Burning of fuels
Explanation
Correct Option
bNo explanation available
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Discussions (2)
Dave333
4 years ago
Photosynthesis removes CO2 from the atmosphere and replaces it with O2. Respiration takes O2 from the atmosphere and replaces it with CO2.
Yhoosewph
9 years ago
The selected answer is wrong:
i got the answer for number 21 and it was marked wrong
REF: Essential Biology Textbook For Senior Secondary School
