Which of the following is not taken into account in the construction of an ecological pyramid?

In an ecosystem, there are more prey than predators. This relationship is called

The pyramid of energy is always:

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?

Which of the following statements is not correct?

In which ecosystem is the pyramid of biomass inverted?