The pyramid of biomass and the pyramid of number represent:

In a forest ecosystem, a pyramid of biomass is upright. If $P$ is at the highest trophic level, $Q$ is at the second trophic level, and $R$ is at the lowest trophic level, identify $P, Q,$ and $R$ from the following options.

Explain various types of ecological pyramids.

Which of the following is $NOT$ a limitation of an ecological pyramid?

In which of the following is the pyramid of biomass $NOT$ upright?

The pyramid of energy is always ..........