Inverted pyramid of biomass can be traced in one of the following ecosystems

Distinguish between 

$(a)$ Upright and inverted pyramid

$(b)$ Food chain and Food web

Pyramid of energy is

Consider the following statements about ecological pyramids

$I.$ Charles Elton developed the concept of ecological pyramid

$II.$ After the 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?

What is the rate of secondary production in the energy pyramid given below?

$A $ : Ecological pyramid of biomass is generally inverted in sea.

$R$ : Biomass of fishes far exceeds that of phytoplanktons.