If birth rate declines slowly after death rate falls, what will be the main planning challenge?

Correct answer: Expanding services for a rapidly rising population

Correct answer: A. When the death rate falls but the birth rate remains high for some time, more people survive while births continue at a relatively high level. This can produce a period of rapid population growth. Planning authorities then need to anticipate and expand schools, health centres, housing, drinking water, sanitation, transport, food supply, and employment opportunities. A is correct because rapid growth increases the number of people who need services and infrastructure. B is wrong because ignoring the population would make planning less realistic. C is wrong because migration and weather are different concepts. D is wrong because reliable census and population data are useful for estimating needs. The delay between the fall in death rate and the later fall in birth rate is often described as a time lag; it can create special planning pressure. Memory cue: deaths fall first, births stay high for a while, so service demand rises quickly.