In a grassland ecosystem,the pyramid of numbers is .....

$A$: Ecological pyramid of biomass is generally inverted in the sea.
$R$: Biomass of fishes far exceeds that of phytoplanktons.

Which of the following representations shows the pyramid of numbers in a grassland ecosystem?

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?

Give scientific reasons: Energy pyramids are never inverted.

The pyramid of energy in a forest ecosystem is