Assertion : In sigmoid growth curve, population finally stabilizes itself.

Reason : Finally, the death rate increases than the birth rate.

Any species growing …$A$… under unlimited resource conditions can reach enormous population densities in a short time. Darwin showed how even $\ldots$ $B$… growing animal like elephant could reach enormous numbers in absence of check and that characteristics of organism is called $C$

Choose the correct option for $A , B$ or $C$ respectively

In India, if the marriage age is changed to $21$ years then

The formula of growth rate for population in a given time is

Population of any species is