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Why are populations of two different years needed to understand population growth?

Answer and explanation

Correct answer: Because growth shows the change in population over time

Direct answer: A is correct. Growth describes change, so it requires comparison between at least two points in time. If a place has 2,000 people in one year and 2,500 in a later year, the difference shows an increase of 500 people during that period. A single year can tell us the population size at that time, but it cannot by itself show whether the number is rising, falling or remaining stable. B is wrong because a population can be counted or estimated for one year; that figure simply does not show growth alone. C is wrong because area is not the sole cause or measure of population growth. D is wrong because weather may influence some conditions, but population growth is studied through population change and its demographic causes. Memory cue: one date gives size; two dates reveal change.

Related tags

Population GrowthTime ComparisonAbsolute ChangePopulationGeographyClass 9 Mcq

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