Locomotion occurs in sand worm or Nereis through

Chaetae

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Setae

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Legs

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Parapodia

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Solution

The correct option is D Parapodia
Nereis possess setae and parapodia for locomotion. They may have two types of setae, which are found on the parapodia. Locomotor chaetae are for crawling and are the bristles that are visible on the exterior of the Polychaeta. They are cylindrical in shape, found in sandy areas, and they are adapted to burrow.
So the correct answer is 'Parapodia'.

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