Which group is most correct when writing a short answer on the role of rivers?

Correct answer: Irrigation, water supply, fertile soil, transport and hydropower

Correct answer: A. Rivers are important natural systems that support both people and ecosystems. Their water is used for irrigation, which helps crops grow, and for domestic and industrial water supply. Rivers also carry and deposit fine sediments that can make nearby floodplain soils fertile. In suitable places, flowing or falling water turns turbines and produces hydroelectricity. Rivers may also support inland transport where the channel is navigable. Option A is correct because it gives several genuine roles instead of one narrow function. Option B is wrong because dust and smoke are not the main benefits of rivers. Option C is wrong because mountains and fire do not describe river services. Option D is wrong because deserts and salt are not a complete or generally correct account of river importance. A good short answer should list clear points and avoid exaggerated claims. Memory cue: rivers support farms, homes, movement, power, and fertile land.