The locomotory organ of an earthworm is:

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(A) The earthworm $(Pheretima)$ belongs to the phylum $Annelida$.Locomotion in earthworms is primarily facilitated by $Setae$ (singular: $Seta$),which

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Setae

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(A) The earthworm $(Pheretima)$ belongs to the phylum $Annelida$.Locomotion in earthworms is primarily facilitated by $Setae$ (singular: $Seta$),which are small,hair-like chitinous structures embedded in the body wall.These $Setae$ help in gripping the soil and providing traction during movement.$Parapodia$ are found in aquatic annelids like $Nereis$,$Suckers$ are found in leeches $(Hirudinaria)$,and $Pseudopodia$ are characteristic of $Amoeba$.

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Definitions / Explanation:
$(i)$ Exonephric
$(ii)$ Enteronephric

What is the function of setae?

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