The base of an ecological pyramid represents the

A) producer trophic level.
B) primary consumer trophic level.
C) secondary consumer trophic level.
D) top predator trophic level.
E) decomposer trophic level.

Ecological Pyramid

A graphical representation that shows the biomass or bio productivity at each trophic level in a given ecosystem.

Producer Trophic Level

The first level in a food web, comprised of organisms that produce organic materials (usually through photosynthesis) from inorganic substances.

Base

A substance that can accept hydrogen ions (protons) or more generally, donate a pair of valence electrons; in nucleic acids, a nitrogen-containing molecule that forms part of the genetic code.