The correct option is D All of the above
Ecological pyramids of three types. They are pyramid of numbers, pyramid of biomass and pyramid of energy. Pyramid of number depicts the number of individual organisms at different trophic levels of food chain. Pyramid of biomass indicates decrease of biomass in each tropical level from base to top of the pyramid. Pyramid of energy indicates the amount of energy is needed as it flows upwards to support the next trophic level.