Q.3 (2) Distinguish between Expansive pyramid and Constrictive pyramid.
Best answer
Answer: An expansive pyramid has a broad base showing high birth rate, while a constrictive pyramid has a narrow base showing low birth rate.
| Point | Expansive pyramid | Constrictive pyramid |
|---|---|---|
| Shape | Broad base, sides tapering quickly to a narrow top (triangular). | Narrow base, wider in the middle and upper ages (bell/urn shaped). |
| Birth rate | High birth rate. | Low and declining birth rate. |
| Death rate | High death rate; low life expectancy. | Low death rate; high life expectancy. |
| Population | Large proportion of children; population growing fast. | Large proportion of old people; population stable or declining. |
| Example | Developing countries such as Niger, Nigeria, Afghanistan. | Developed countries such as Japan, Germany, Italy. |
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