Nutrient Cycles, or Biogeochemical Cycles, Refer to ______________

Nutrient cycles, or biogeochemical cycles, refer to ______________.

A) energy passed from one organism to another
B) plants and organic matter entering and leaving the biosphere
C) the movement of life's essential chemicals or nutrients through an ecosystem
D) the sharing of nutrients between a parasite and a host
E) None of the above refer to nutrient cycles.