Observe the given figure representing different are pyramids for human population answer the following question.

If the reproduction rate is equal in all the given pyramids, the chances of mortality after 50 years will be highest in:

D

The correct answer is Option (4) → D

Expanding population pyramid

A population pyramid that is very wide at the younger ages, with a high birth rate and perhaps low life expectancy therefore leading to high death rate.The population is said to be fast-growing, and the size of each birth cohort increases each year.

Stable population pyramid

A pyramid can be described as stationary if the percentages of population (age and sex) remain approximately constant over time.In a stationary population, the numbers of births and death roughly balance one another.

Declining population pyramid

A population pyramid that is narrowed at the bottom. The population is generally older on average.Urn-shaped age pyramids exhibit low numbers or percentages of pre-reproductive individuals, a maximum number of individuals in the reproductive age group, and a small number of individuals in the post-reproductive age group. Such a population is considered to decline.

                                         Representation of age pyramids for human population