The age distribution plotted for the population is known as the 'Age pyramid'. Select the three types of age pyramids based on the shape and age groups:
(A) Expanding
(B) Inverted
(C) Stable
(D) Declining
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A), (C) and (D) only
An age pyramid plots the share of individuals in each age group. Its shape shows the growth status of a population.
(A) Expanding — A type of age pyramid. A broad base of young individuals shows a growing population.
(B) Inverted — Not one of the three. ‘Inverted’ is used for ecological pyramids, such as the pyramid of biomass in the sea, not for age pyramids.
(C) Stable — A type of age pyramid. The young and middle-aged groups are about equal, so the population stays the same size.
(D) Declining — A type of age pyramid. A narrow base of young individuals shows a shrinking population.
NCERT Extract:
Population Attributes – …
Figure 11.1 Representation of age pyramids for human population