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Which two process both increase the amount of carbon dioxide in the atmosphere?

a
volcanic eruptions and cellular respiration
b
spontaneous human combustion and photosynthesis
c
burning of fossil fuels and photosystem II and I
d
photosynthesis and cellular respiration

1 answer

The correct answer is:

a: volcanic eruptions and cellular respiration

Both volcanic eruptions release carbon dioxide into the atmosphere, and cellular respiration is a process by which living organisms convert glucose and oxygen into energy, producing carbon dioxide as a byproduct.