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

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?

Under what condition, the upright pyramid of biomass becomes inverted

Write a short note on pyramid of numbers and pyramid of biomass.

Pyramid of number becomes partly inverted partly erect for

The pyramid that cannot be inverted in a stable ecosystem, is pyramid of