In which of the following is exponential growth observed?

The cause of zero growth of population is

What is the primary factor for population growth?

From the given graph of population growth,select the correct option that shows the correct value of '$r$' and the corresponding age pyramid.

Certain characteristic demographic features of developing countries are:

The integral form of the exponential growth equation is $N_{t} = N_{0} e^{rt}$. Identify $A, B, C$,and $D$ from the given equation where:
$A$: Population density after time $t$
$B$: Population density at time zero
$C$: Intrinsic rate of natural increase
$D$: The base of natural logarithms $(2.71828)$