Question

types of pyramids and their defination

Answer 1

pyramid of number; it represents the population of organisms at each trophic level.
pyramid of biomass: it represents the availability of food at each trophic level
pyramid of energy:  it represents the availability of energy at each trophic level

Answer 2

1. The Pyramid of Energy

The energy pyramids give the best picture of the overall nature of the ecosystem.

2. The Pyramid of Biomass

They are comparatively more fundamental, as they, instead of the geometric factor, show j the quantitative relationships of the standing crops.

3. The Pyramid of Numbers

They show the relationship between producers, herbivores and carnivores at successive trophic levels in terms of their number.