In the Age sex pyramid a narrow base and a tapered top represents which of the following?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Declining Population Pyramid
A narrow base means few births. The Japan pyramid has a narrow base and a tapered top, with low birth and death rates.
Option (1) Declining Population Pyramid — Correct. Low birth rates make the base narrow, and the population growth is zero or negative.
Option (2) Constant Population Pyramid — Incorrect. Australia’s pyramid is bell shaped and tapered towards the top, because birth and death rates are almost equal.
Option (3) Expanding Population Pyramid — Incorrect. Nigeria’s pyramid is triangular with a wide base, because of high birth rates.
Option (4) Triangular Shaped Pyramid — Incorrect. A triangular pyramid has a wide base. It is the shape of an expanding population.
Note: This question is taken from the pre-rationalised NCERT book. The latest edition (2026-27) does not have this part. An extract of the pre-rationalised NCERT book is given below for the benefit of students.
Pre-rationalised NCERT: “Declining Populations … The Japan pyramid has a narrow base and a tapered top showing low birth and death rates. The population growth in developed countries is usually zero or negative.”
Fig. 3.3: Declining Population |
