All but which of the following statements are true about biogeochemical cycles?

It is D

Explanation:

all the others are false

a.

Biogeochemical cycles are cycles involving only nonliving components.

b.

The rock cycle is a biogeochemical cycle.

c.

Biogeochemical cycles are not an important part of the Earth system.

d.

Carbon, nitrogen, and oxygen cycles are biogeochemical cycles.

      n

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