What is the relation between population growth and time period?

Correct answer: Population growth is always measured with reference to a specific time period

The direct answer is A. Population growth means the change in the population of a place between two times, so a time period is essential. We may compare a beginning population with a later population after one year, ten years, or another clearly stated interval. In simple form, change equals later population minus earlier population; a growth rate also relates this change to the starting population and the period. Option A is correct because it identifies the required time reference. Option B is wrong because growth cannot be described without comparing times. Option C describes the population at one instant, which is population size at that time, not growth. Option D is wrong because the same numerical change can mean different growth rates over different periods. Memory cue: population size is a snapshot; population growth is a change between dates.