Maximum survival and reproductive capacity shown by a population under optimal environmental conditions is called

If natality is represented by $B$,mortality by $D$,immigration by $I$,emigration by $E$,and population density by $N$,then the population density at time $t+1$ is represented by:

The effect of various factors on a population is reflected in its size,which can be expressed by .......

Under a particular set of selection pressure,organisms evolve towards the most efficient reproductive strategy. For example:
$A$) Oysters produce a large number of small-sized offspring.
$B$) Mammals produce a small number of large-sized offspring.
In the light of the above statements,choose the correct option.

The impact of immigration on population density is

In a population,there are $100$ small-sized Parthenium plants and only $1$ large-sized Banyan tree. Which of these has a lower population density?