Ecological pyramids represent the relationship between the organisms at different trophic levels and they are generally inverted for :

The pyramid of numbers deals with the number of what?

Which ecosystem has the maximum number of producers per unit area?

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?

An inverted pyramid of biomass can be observed in which of the following ecosystems?

Identify the given pyramid based on biomass.