In a food chain, the total amount of living material is depicted by
Pyramid of energy
Pyramid of numbers
Pyramid of biomass
All of these
To show how many organisms are present at each level of a food chain, ecologists use a model called
Given below is one of the types of ecological pyramids
This type represents
$A $ : Ecological pyramids cannot explain all the vital functions of any ecosystem.
$R$ : Pyramids actually does not explain the role of organisms working at more than one trophic levels.
The pyramid of energy in a forest ecosystem is