SCIENCE
ENVIRONMENTAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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an even distribution over all ages
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more older people than young people
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more younger people than older people.
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more middle-aged people than younger people.
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Detailed explanation-1: -Age structure data allow the rate of growth (or decline) to be associated with a population’s level of economic development. For example, the population of a country with rapid growth has a triangle-shaped age structure with a greater proportion of younger individuals who are at or close to reproductive age.
Detailed explanation-2: -E is correct. The fastest growing segment is people aged 80 years and older, with a growth rate twice that for people aged 65 years and older, and almost four times that for the total population.
Detailed explanation-3: -The youngest country in the world is Niger, where almost 50% of the population is below the age of 15.
Detailed explanation-4: -Countries with lower median age tend to have higher population growth rates. Lower-income countries tend to have a lower median age. This is because they have a ‘younger’ population overall: high fertility rates across these countries mean they have larger populations of young children and adolescents.