Which one of the following is not used for construction of ecological pyramids?

The relationship in an ecosystem can be depicted in

The relation between producers and consumers in an ecosystem can be graphically represented in the form of a pyramid called

Consider the following statements about ecological pyramids:
$I.$ Charles Elton developed the concept of ecological pyramid.
$II.$ After his name,these pyramids are also called as Eltonian pyramids.
$III.$ It is a graphical representation or pyramid-shaped diagram which depicts the number of organisms,biomass,and energy at each trophic level.
Which of the statements given above are correct?

Choose the correct pair of Trophic level - Dry weight $(kg\ m^{-2})$ based on the pyramid of biomass in a grassland ecosystem.

Which of the following ecological pyramids is most representative of functional characteristics of an ecosystem?