Question

What is the purpose of the biogeochemical cycles?

A.to cycle energy through a food chain
B.to recycle matter through the biosphere
C.to recycle rocks through the layers of Earth
D.to cycle nutrients through the human body

Answer 1

The purpose of the biogeochemical cycles is B. to recycle matter through the biosphere.
The geo part in the word makes D incorrect (because it deals with humans only, and not other inhabitants of the planet). It doesn't deal with food at all, so A is also incorrect. C is incorrect because the bio part means that there are beings involved, not only rocks. So B is correct because it encompasses all matter.