It has a broad base showing more young people and a tapering apex with less number of old people. Identify the type of population pyramid.
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Expansive pyramid
A population pyramid shows the population of a country by age group (and sex), with the youngest at the bottom. An expansive pyramid has a broad base that narrows quickly towards the top: a high birth rate gives many children, and a high death rate leaves few old people. It is typical of developing countries such as Nigeria and Bangladesh.
Why the other options are incorrect
Option (2) Stationary pyramid — Incorrect. A nearly straight-sided shape, with about the same numbers in each age group till old age, when birth and death rates are both low.
Option (3) Constrictive pyramid — Incorrect. A narrow base and a wider middle, seen when the birth rate is falling, as in Japan.
Option (4) Stable pyramid — Incorrect. The pyramid of a population whose birth and death rates stay the same for a long time, so its shape does not change over the years.