Why does river water come under greater pressure in cities?

Correct answer: Due to rising population, industry and domestic demand

The direct answer is A: rising population, industry and domestic demand. Cities require water for drinking, cooking, cleaning, sanitation, construction, businesses and factories. As urban population and economic activity grow, withdrawals from rivers may increase. Cities can also produce sewage and industrial waste, so pollution adds pressure on the river’s usable water. Option A is correct because it identifies the main human causes of demand and stress. Option B is wrong because a river is not under pressure merely because it has glaciers; glaciers are only one possible source of water. Option C is wrong because cities use water extensively, not not at all. Option D is wrong because pollution does occur and makes management harder. Memory cue: more people and more activity mean more demand and more waste.