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d
Producers are at the bottom of the energy and biomass pyramids, only.
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.
Producers are at the bottom of the energy and biomass pyramids, only.