Q. Which of the following statements is/are not correct regarding ‘population pyramids’?
1. A bell shaped pyramid represents constant population.
2. A pyramid of narrow base and tapered top represents expanding population.
3. A triangular pyramid best represents developed countries.
Select the correct answer using the codes given below:

[A] 1 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: B
Notes:

Explanation: Population pyramids:

  • A population pyramid reflects the characteristics of population like age-sex structure. The shapes of pyramids represent different meanings.
  • A bell shaped pyramid represents constant population and are called as Stationary or near-stationary population pyramids. It displays somewhat equal numbers or percentages for almost all age groups.
  • A pyramid of narrow base and tapered top explains declining population (not expanding) like that of Japan.
  • Triangular shaped pyramid explains expanding population and usually a feature of developing nations like India.
  • The population pyramid of Australia is an example of expanding population and its expanding continuously.

Source: NCERT

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