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As an ecosystem, wetlands are useful for which of the following?
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- For nutrient recovery and recycling
- For releasing heavy metals through absorption by plants.
- In reducing siltation of rivers by retaining sediments
- All the above
Correct Option: D
As wetland is a transition zone between the riverine drainage and oceanic reservoir, it plays a big role in maintaining high biodiversity and in retaining sediments from the rivers before entering into large water bodies.
