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What type of human population is represented by the following age pyramid?
A
Expanding population
B
Vanishing population
C
Stable population
D
Declining population
Detailed Solution
An age pyramid shows the proportion of pre-reproductive, reproductive and post-reproductive individuals in a population.
The given pyramid is urn-shaped: the pre-reproductive group at the base is the smallest and is narrower than the reproductive group above it.
Fewer young individuals means that fewer will enter the reproductive age in future, so the population will decrease.
An expanding population has a triangular pyramid with a broad base, and a stable population has a bell-shaped pyramid with nearly equal pre-reproductive and reproductive groups.
Hence the pyramid represents a declining population.
The given pyramid is urn-shaped: the pre-reproductive group at the base is the smallest and is narrower than the reproductive group above it.
Fewer young individuals means that fewer will enter the reproductive age in future, so the population will decrease.
An expanding population has a triangular pyramid with a broad base, and a stable population has a bell-shaped pyramid with nearly equal pre-reproductive and reproductive groups.
Hence the pyramid represents a declining population.