a
respiration, decay and combustion
b
photosynthesis, respiration and transpiration
c
ozone depletion, combustion and decay
d
photosynthesis, decay and respiration
Explanation
Correct Option
aVideo Explanation
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Atiyeye
11 years ago
Respiration in the sense that we breathe out CO2, decay in the sense that organic matter is partly composed of carbon and oxygen, and combustion in the sense that some organic materials that are only composed of carbon in the presence of oxygen,burn to produce CO2.Therefore,A is the answer.
