An ecological pyramid illustrates the amount of energy at each trophic level. a biomass pyramid differs by showing what at each trophic level

It shows a diagrammatic representation of biomass at different tropic levels in an ecosystem

Explanation:

Goat eat grass. The goat are in turn eaten by the Man. The grass has the greatest biomass in this chain. Its biomass, therefore, sits at the bottom of the pyramid. Conversely, the man has the lowest biomass in the chain and hence sits on top of the pyramid.