In order for the human population to achieve zero population growth, which of the following must occur?

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There must be more post-reproductive individuals than reproductive individuals

There must be more pre-reproductive than reproductive individuals

There must be the same number or fewer pre-reproductive individuals as there are reproductive individuals

There must be more reproductive than pre-reproductive individuals

answer is C.

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Detailed Solution

Zero population is the condition where the birth rate and the death rate are equal. The population in this stage is stabilised. To achieve such condition the pre-reproductive individuals count must either equal or less than the reproductive individuals. If the post reproductive members are more than reproductive it is a declining population having death rate higher than birth rate.If the reproductive members are fewer than pre-reproductive members, the population will not be rising as again death rate is higher than birth rate.

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