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Which option can cause population decline?

Answer and explanation

Correct answer: Death rate is higher than birth rate

Direct answer: Option C, when the death rate is higher than the birth rate. Population size depends on people being added through births and in-migration and people being removed through deaths and out-migration. First compare births and deaths: if deaths are greater than births, there is a natural decrease. For example, if 90 people are born but 120 die, the natural change is a decrease of 30 people, unless migration changes the final total. Option A is wrong because more births than deaths normally produce natural increase. Option B is wrong because in-migration brings people into an area and tends to increase its population. Option C is correct because more deaths than births remove people faster than births add them. Option D is wrong because a rise in births adds people. Memory cue: deaths greater than births means natural decrease; always consider migration separately when calculating total population change.

Related tags

Population DeclineDeath RateBirth RateNatural DecreaseProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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