In which area can rapid population growth affect the water crisis most?

Correct answer: Where water sources are limited and demand is rising quickly

The direct answer is A: the greatest effect is likely where water sources are limited and demand is rising quickly. Rapid population growth adds more users who need water for drinking, cooking, sanitation, farming and other activities. If the available supply is already small, the same rivers, wells, reservoirs or groundwater sources must serve many more people. This can increase competition, shortages and pressure on water quality. Option A contains both important conditions: limited supply and rapidly increasing demand. Option B is less likely to face a serious crisis because sufficient supply and low demand reduce pressure. Option C is generally less likely because a declining population tends to reduce demand, other conditions being equal. Option D is not the best answer because strong management can conserve and distribute water more effectively, although it cannot create an unlimited supply. Memory cue: water stress becomes strongest when demand rises while supply stays limited.