A) A is a triangle shaped age pyramid, where pre-reproductive stage is very large as compared to the reproductive and post reproductive stages of the population. This type of age structure indicates that the population would increase rapidly.
B) B is an inverted bell shaped age pyramid, where number of pre-reproductive and reproductive individuals is almost equal. This type of age structure indicates that the population is stable.
C) C is an urn shaped age pyramid, where more number of older people are present. This type of age structure indicates that the population is declining.
D) All of these
Correct Answer: D
Solution :
[d] Triangular age pyramid has high proportion of pre-reproductive individuals, moderate number of reproductive individuals and fewer post-reproductive individuals. It represents young or rapidly growing population. In urn-shaped age pyramid, the number of reproductive individuals is higher than the number of pre-reproductive individuals. It represents declining or diminishing population. In bell-shaped age pyramid, the number of pre-reproductive and reproductive individuals is almost equal. Post reproductive individuals are comparatively fewer. It represents stable or stationary population where growth rate is nearly zero.
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