Why is it incomplete to explain population distribution only by physical reasons?

Correct answer: Because employment transport and services also affect it

The direct answer is A: employment, transport, and services also affect population distribution. Physical factors such as relief, climate, water, and fertile soil are important, but they do not explain every settlement pattern. Human factors can change where people live even when natural conditions are similar. Step by step: people need suitable land and water; they also seek jobs, roads, schools, hospitals, markets, and communication; these human opportunities attract or retain people; therefore distribution results from both physical and human influences. Option A is correct because it gives three major human factors. Option B is wrong because physical factors do affect population distribution. Option C is wrong because language alone cannot explain all settlement patterns. Option D is wrong because distribution has a clear meaning: the spatial arrangement of people. A balanced answer considers both nature and human decisions. Exam cue: never explain population distribution using only one type of factor.