Why is future demand estimated in population growth planning?

Correct answer: Because a growing population may need more services

Direct answer: Option A is correct. Population planning uses present data and reasonable projections to estimate how many people may need services in the future. A growing population may require additional schools, teachers, hospitals, health workers, homes, transport, water supply, sanitation, food and employment opportunities. Estimation helps authorities prepare resources instead of reacting only after shortages appear. The exact future cannot be known with certainty, so projections are estimates based on assumptions about births, deaths and migration. Option B is false because population size and age structure strongly affect service demand. Option C is unrelated: population growth does not create rivers. Option D is also unrelated and does not describe planning. Memory cue: population projections turn expected numbers into plans for people’s needs.