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Which option best describes the ecological importance of rivers?

Answer and explanation

Correct answer: They support aquatic life, wetlands and nutrient cycles

Correct answer: C. A river is an ecosystem as well as a channel carrying water. Its flowing water, banks, pools, sediments, and connected wetlands provide habitats for fish, aquatic plants, insects, birds, and many other organisms. Rivers also transport nutrients and sediments. These materials can move through food webs and help maintain the productivity of connected floodplains and wetlands. This does not mean that every river condition is always healthy; pollution, excessive extraction, and habitat damage can reduce ecological quality. Option A is wrong because road construction is not the ecological role of rivers. Option B is wrong because floods are only one possible river-related event, not the whole ecological importance. Option C is correct. Option D is the opposite of reality. Memory cue: rivers connect water, habitats, organisms, and nutrients.

Related tags

DrainageRiversEcosystemWetlandsRole Of RiversGeographyClass 9 Mcq

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