What kind of planning may be needed when population density is high?

Correct answer: Better planning for housing, water and transport

The direct answer is A: better planning for housing, water, and transport. Population density means the number of people living in a given unit of area, often expressed as people per square kilometre. When density is high, many people use the same land and services. The reasoning is: more people in limited space → greater demand for homes, drinking water, roads, public transport, sanitation, schools, and health facilities → careful urban and regional planning becomes necessary. Option A directly addresses these pressures. Option B, a wildlife hunting plan, harms animals and is not a response to population-service pressure. Option C, drying rivers, destroys water supply and ecosystems. Option D, closing schools, reduces an essential service instead of planning it better. High density does not automatically mean every place is poor, but it does require efficient and fair management. Memory cue: high density means high pressure on facilities.