(B) The sandworm,scientifically known as $Nereis$,belongs to the phylum $Annelida$ and class $Polychaeta$.It possesses lateral appendages called $Para

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(B) The sandworm,scientifically known as $Nereis$,belongs to the phylum $Annelida$ and class $Polychaeta$.It possesses lateral appendages called $Parapodia$ which are used for swimming and locomotion.$Parapodia$ are fleshy,paddle-like structures that help the organism move through its environment.