Iogeochemical cycles a. are not essential for life b. move through abiotic and biotic regions c. are the result of natural disasters d. provide the greatest amount of energy for the earth

Answer is b. move through biotic and and abiotic regions.

Biogeochemical cycles involves continuous movement of chemical elements from biotic (living) to abiotic (non-living), from soil to plants and atmosphere to land or water bodies. Examples of biogeochemical cycles are carbon cycle, nitrogen cycle, oxygen cycle, water cycle. These are called cycles because matter is conserved and moves from abiotic to biotic in a cyclic manner.  

Correct option: B (move through abiotic and biotic regions).

Biogeochemical cycles:

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