For any natural ecosystem, which of the following statements applies to the energy pyramid, the biomass pyramid, and the numbers pyramid?
a
Producers are at the bottom level of all three pyramids.
b
Consumers are at the bottom of the energy pyramid, only.
c
Consumers form the bottom levels, while producers are at the top.
d
Producers are at the bottom of the energy and biomass pyramids, only.
d
Producers are at the bottom of the energy and biomass pyramids, only.