Choose the Letter of the Best Match from the Following

Multiple Choice

Choose the letter of the best match from the following:
-Cyclic paths involving both biological and chemical processes.Begin with chemicals being incorporated into the bodies of organisms from nonliving reservoirs such as atmosphere or the waters of oceans or rivers or rocks.

A) ecological pyramid of energy
B) ecosystem
C) species diversity cline
D) food web/food chain
E) biogeochemical cycles