Which major biome of India is represented in the given figure?

Which of the following is an omnivore?

Match the column-$I$ with column-$II$ and select the correct option given:-

Column-$I$	Column-$II$
$A$. $J$-shape curve	$(i)$ Sigmoid curve
$B$. Verhulst-Pearl logistic growth	$(ii)$ Breed only once in their lifetime
$C$. Extinction of Abingdon tortoise	$(iii)$ Competition for same resources
$D$. Pacific salmon fish and Bamboo	$(iv)$ Resources unlimited

$A$: Different ecotypes of a species,despite being genotypically different,are interfertile.
$R$: They are locally natural selections from a pool of genetic variations found in the gene pool of a 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?
$(a)$ $(b)$ $(c)$

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