Which term describes population pyramids with a narrow base and broad top, indicating aging populations?

Which term describes population pyramids with a narrow base and broad top, indicating aging populations?

• A. Constrictive Pyramid
• B. Expansive Pyramid
• C. Stationary Pyramid
• D. Pyramid Type

Answer: (A)

Population pyramids use shape to reflect birth rates and aging. A narrow base with a broad top shows few new births combined with many older individuals, so the population is aging. This pattern is described as a constrictive pyramid. It signals low fertility and longer life expectancy, which shifts the age distribution toward older ages and leaves a smaller young cohort. An expansive pyramid, by contrast, has a wide base and indicates many children and rapid population growth. A stationary pyramid is more rectangular, showing relatively constant numbers across age groups and slow growth. The term pyramid type is not specific enough to describe the aging structure.

Population pyramids use shape to reflect birth rates and aging. A narrow base with a broad top shows few new births combined with many older individuals, so the population is aging. This pattern is described as a constrictive pyramid. It signals low fertility and longer life expectancy, which shifts the age distribution toward older ages and leaves a smaller young cohort.

An expansive pyramid, by contrast, has a wide base and indicates many children and rapid population growth. A stationary pyramid is more rectangular, showing relatively constant numbers across age groups and slow growth. The term pyramid type is not specific enough to describe the aging structure.