In which condition is population more likely to grow rapidly?

Correct answer: Birth rate is high and death rate is low

The direct answer is A. Rapid natural population growth is most likely when many people are being added through births and relatively few are being removed through deaths. In simple terms, natural increase equals birth rate minus death rate. A high birth rate combined with a low death rate creates a large positive difference, so population can rise quickly. Option A is correct because both conditions push the number upward. Option B is wrong because low births and high deaths usually produce slow growth, no growth, or decline. Option C is wrong because continuous movement out of an area is out-migration, which reduces that area’s population, although immigration elsewhere may increase another area’s population. Option D is wrong because if births and deaths are both absent, natural increase is zero; this does not create rapid growth. Migration can also affect total growth, but among the given choices A is the clear answer. Memory cue: many added, few removed means rapid growth.