In which situation can the population of a city increase?

Correct answer: People come to the city for jobs

Direct answer: Option A. When people move into a city for employment, the city receives in-migrants. Their arrival adds to the city’s population, so the population can increase even apart from births. A city’s population may also be affected by births, deaths, and people leaving, but the situation stated in A clearly adds residents. Option B is wrong because people leaving create out-migration and tend to reduce the city’s population. Option C is wrong because if births and migration are both zero, there is no addition through either process; deaths could even cause a decline. Option D is wrong because closing services does not itself add residents and may encourage people to leave. Do not confuse population growth with physical expansion of a city: more people is population growth, while a larger built-up area is spatial expansion. Memory cue: people coming in add to the population; people going out subtract from it.