Water vascular system is found in
Grade :10

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Hydra

Leech

Fish

Starfish

answer is D.

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Detailed Solution

Concept: Sea stars, often known as starfish, are an echinoderm group of animals. The water vascular system of echinoderms enables them to execute activities like locomotion, the delivery of food and waste, and even the process of respiration. They are members of the Asteroidea class. This is the best choice as a result.
Hence, option 4 is the correct answer.

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