The given human population age pyramid represents..........

Comment on the following figures: $I, II$ and $III$. Here,$A, B, C, D, G, P, Q, R, S$ represent different species.

The figure given below is a diagrammatic representation of the response of organisms to abiotic factors. What do $a$,$b$,and $c$ represent respectively?

Countries with high population growth rates have taken measures to reduce them. The figure below shows the age pyramids of populations. Which of the following is a correct interpretation for their status after $20$ years?

Which of the following phenomena does not play a significant role in the maintenance of homeostasis in an ecosystem?

The figure given below is a diagrammatic representation of the response of organisms to abiotic factors. What do $(a)$,$(b)$,and $(c)$ represent respectively?
$(a)$ $(b)$ $(c)$