Which pyramid depicts the largest base of pre-reproductive population?
Answer (1)
The expansive pyramid depicts the largest base of pre-reproductive population.
Explanation
Understand the problem The question asks us to identify which pyramid structure represents the largest pre-reproductive population. Population pyramids are graphical representations of the age and sex distribution of a population. The base of the pyramid represents the youngest age groups (pre-reproductive), while the top represents the oldest. A wider base indicates a larger proportion of young individuals in the population.
Analyze expansive pyramid An expansive pyramid has a wide base and a narrow top. This shape indicates a high birth rate and a high death rate, with a large proportion of the population in the younger age groups. This type of pyramid is characteristic of populations with rapid growth.
Analyze stationary pyramid A stationary pyramid has a more rectangular shape, indicating a relatively even distribution of the population across age groups. This suggests a stable population with low birth and death rates.
Analyze constrictive pyramid A constrictive pyramid has a narrow base and a wider top. This indicates a low birth rate and a declining population, with a larger proportion of the population in the older age groups.
Determine the pyramid structure Since the question asks for the pyramid structure that depicts the largest base of pre-reproductive population, the answer is the expansive pyramid.
Examples
Population pyramids are used by demographers and policymakers to understand the age structure of a population and to make predictions about future population growth or decline. For example, a country with an expansive pyramid may need to invest in education and healthcare for its growing young population, while a country with a constrictive pyramid may need to address issues related to an aging workforce and healthcare for the elderly.
