Explain the four stages of population pyramid
The four stages of population pyramid are:
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Expansive pyramid: This pyramid has a broad base and a narrow top, indicating a large population of young people and a small population of elderly people. This shape is typically seen in developing countries where birth rates are high, and life expectancy is increasing.
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Constrictive pyramid: This pyramid has a narrow base and a wider top, indicating a small population of young people and a large population of elderly people. This shape is typically seen in developed countries where birth rates are low, and life expectancy is high.
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Stationary pyramid: This pyramid has a uniform shape, indicating that the population is stable with a steady birth and death rate. This shape is typically seen in developed countries where birth rates have leveled off, and life expectancy is high.
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Inverted pyramid: This pyramid has a narrow base and a broad top, indicating a larger population of elderly people than young people. This shape is typically seen in countries with declining birth rates and increasing life expectancy, which can lead to an aging population.
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