Why does a transport network affect population distribution?

Correct answer: It increases access to markets jobs and services

The direct answer is A: transport increases access to markets, jobs and services. A transport network connects villages, towns and cities. Step by step, roads, railways or other routes make travel easier; easier travel allows goods and people to move; this improves access to markets, schools, hospitals and workplaces; better opportunities attract settlement and can influence population distribution. Option A is correct because it gives the real human and economic mechanism. Option B is wrong: transport may change settlement patterns, but it does not end all settlements. Option C is wrong because transport does not always make climate harsh; climate is mainly a natural condition. Option D is wrong because transport generally helps officials reach people and conduct a census rather than making census work impossible. Thus transport is a human factor affecting population distribution. Exam cue: when you see transport, connect it with accessibility, employment, services and migration.