Question

which of the following two cycles are the most closely related in their role in sustaining life?
a. carbon and nitrogen
b. water and nitrogen
c. carbon and oxygen
d. nitrogen and phosphorus
please select the best answer from the choices provided
○ a
○ b
○ c
○ d

Explanation:

Plants take in carbon dioxide (\(CO_2\)) during photosynthesis and release oxygen (\(O_2\)). Animals take in \(O_2\) during respiration and release \(CO_2\). This interdependence shows a close relationship between the carbon and oxygen cycles in sustaining life.

Answer:

C. carbon and oxygen