The relationship in an ecosystem can be depicted in

Give differences : Upright Pyramid and Inverted Pyramid

If producer is a large tree that supports a number of herbivorous animals which are further attacked by ectoparasites, the pyramid of number shall be

The upright pyramid of number is absent in

$A $ : Ecological pyramids cannot explain all the vital functions of any ecosystem.

$R$ : Pyramids actually does not explain the role of organisms working at more than one trophic levels.