The passage contains information that would answer which of the following questions about the carbon cycle?
I.What are some of the compounds that are broken down in the carbon cycle?
II.Why are some compounds that are involved in the carbon cycle less reactive than others?
III.What role do bacteria and fungi play in the carbon cycle?
Option (D)
The passage mentions some compounds such as alkaloids, terpenes, and flavonoids that are broken down during carbon cycle. So we can answer I. Also, the passage says that bacteria and fungi catalyze the oxidation of inert products which triggers reactions to produce carbon dioxide. Hence we can answer III.