Animals having multiple or numerous setae are included under

Polychaeta

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Oligochaeta

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Hirudinea

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Onychophora

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Solution

The correct option is A Polychaeta
The Polychaeta, also known as the bristle worms or
Polychaetes are a paraphyletic class of amclid worms,
generally marine, Each body segment has a pair of
fleshy protrusions called parapodia that bear many
bristles called chaetae. Animals having multiple or
numerous setae are included under Polychaeta.

Suggest Corrections

1.	The number and variety of plants, animals, and other organisms	....................
2.	A group or class of animals or plants having certain common and permanent characteristics	....................
3.	The natural environment of a plant or animal species, where it lives, multiplies, and thrives naturally	....................
4.	The numerous species of plants living in their habitat	....................
5.	The numerous species of animals living in their habitat	....................