Correct option is C
The correct answer is (c) Flatworms.
Flatworms, also known as Platyhelminthes, include several species that are endoparasites, meaning they live inside the bodies of their host animals.
Common examples of parasitic flatworms are tapeworms (cestodes) and flukes (trematodes).
These parasites can infect a wide range of animal hosts, including humans, causing various diseases.
Flatworms have adapted to their parasitic lifestyle with features such as hooks, suckers, and complex life cycles involving multiple hosts.
Information Booster
Pleurobrachia:
A genus of comb jellies (Ctenophora) found in marine environments.
Not a parasite; they are free-living and use cilia for locomotion.
Ctenoplana:
Another genus within the phylum Ctenophora, similar to Pleurobrachia.
Also not a parasite, but a free-living marine organism.
Adamsia:
A genus of sea anemones found in marine environments.
Not a parasite; they are sessile and often form mutualistic relationships with hermit crabs.