Which of the Following Statements Is FALSE

Which of the following statements is FALSE?

A) Ecologist use models to represent relationships between biogeochemical cycles and most ecosystems.
B) The physical environment has virtually no reservoir for most elements.
C) Inputs from the physical environment and recycling made possible by decomposers and detritivores maintain the nutrient reserves in an ecosystem.
D) In most major ecosystems, the amount of nutrients that is cycled within the ecosystem is greater than the amount entering or leaving the ecosystem in a given year.
E) Once elements are in the biological part of the biochemical cycles, they are unlikely to leave until the organism dies.