Which option gives a correct social result of population growth?

Correct answer: Demand for education, health care and housing may increase

Direct answer: Option A is correct. Population growth means that more people need to use schools, hospitals, homes, water, transport and other public services. Step by step, the number of residents rises; their basic and social needs also rise; therefore demand for education, health care and housing may increase. If facilities do not expand at a similar pace, overcrowding, competition for services or shortages may occur. Option B is not the direct social result asked for; river depth can be affected by physical processes and human activities, but it is not an automatic consequence of population growth. Option C is wrong because population growth does not automatically reduce the number of mountains. Option D is wrong because soil colour does not change automatically merely because population increases. Population growth can create social pressure and may also influence the environment through human activity, but those effects should not be confused with automatic physical changes. Memory cue: more people usually mean greater demand for services.