What type of human population is represented by the following age pyramid?
Correct answer: C. Declining population
- A. Vanishing population
- B. Stable population
- C. Declining population
- D. Expanding population
Explanation
An age pyramid is a graphic representation of an abundance of individuals of different age groups with pre-reproductive individuals at the base, reproductive individuals in the middle and post-reproductive individuals at the top. A triangular age pyramid has a high proportion of pre-reproductive individuals, a moderate number of reproductive individuals and fewer post-reproductive individuals. It represents a young or rapidly growing population. In a bell-shaped age pyramid, the number of pre-reproductive and reproductive individuals is almost equal. Post-reproductive individuals are comparatively fewer. It represents a stable or stationary population where the growth rate is nearly zero. In an urn-shaped age pyramid, the number of reproductive individuals is higher than the number of pre-reproductive individuals. It represents a declining or diminishing population.
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