The following diagrams are the age pyramids of different populations.

Select the CORRECT statement regarding the above.

Explanation

(a) Fig. A is triangular-shaped age pyramid which is possible only when number of individuals of pre reproductive age group which is turn are more than post reproductive age group. such a population will be rapidly growing or expanding population because of high birth rate and low death rate.
(b) Fig. B is bell-shaped age pyramid which is possible only when number of individuals of pre reproductive and reproductive age groups are the same. Such a population shows zero growth rate because Birth rate and death rate are equal. population is called stable or stationary population.
(c) Fig.C is an Urn-shaped age pyramid which is possible only when number of individuals of pre reproductive age group is less than of post-reproductive age group. In such population, death rate is higher than birth rate and the population is called declining population.