Sea urchin is member of the class

Holothuroidea

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Crinoidea

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Echinoidea

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None of the above

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Solution

The correct option is C Echinoidea
'Sea urchins' also known as 'sea hedgehogs', are small, spiny, globular animals that constitute the class Echinoidea of the echinoderm phylum. Sea urchins move slowly and feed on mostly algae. They are found across the ocean floors worldwide, but rarely in the colder, polar regions. Hence, option C is correct answer.

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