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Standard VI
Chemistry
Surface Water
Question

Estuaries are considered as nutrient trap due to the mixing of
  1. Pond and lake
  2. River and sea water
  3. A and B
  4. None of the above

A
A and B
B
River and sea water
C
Pond and lake
D
None of the above
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Solution
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Estuaries are the delicate water bodies where the fresh water from the river and salty water from the sea water meet and mix-up. They are responsible for transporting and mixing the nutrients. The difference in sedimentation of the water of rivers and sea-water, the wind action and the tidal activity allow the trapping and transport of the nutrients. Reefs, deltas and barrier islands protect the estuaries from the ocean forces.
Hence, the correct answer is 'River and sea water'.

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