Ecological pyramids mainly are of how many types?

Ecological pyramids are primarily of three types: pyramid of numbers, pyramid of biomass, and pyramid of energy. The pyramid of numbers illustrates the number of individual organisms at each trophic level, the pyramid of biomass represents the total mass of living matter at each level, and the pyramid of energy shows the flow of energy through each trophic level in an ecosystem. Each type provides different insights into the structure and functioning of ecosystems.