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:

Carbon is a key element in organic compounds essential for life, and oxygen is used in cellular respiration to release energy. These two cycles are intertwined in processes like photosynthesis and respiration, which are fundamental for sustaining life.

Answer:

C. carbon and oxygen