The Broad Base at the Primary Producer Level in a Trophic

Multiple Choice

The broad base at the primary producer level in a trophic pyramid is due to all of the following EXCEPT the:

A) greatest availability of energy.
B) greatest amount of biomass.
C) relatively higher number of primary producers compared with organisms at other levels.
D) amount of oxygen given off at this level.
E) larger body size of primary producers compared with organisms at other levels.