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Distinguish the following:
Answer variants:
Ascaris, Enterobium, Wuchereria, Trichiuris are some of the examples.
Euplectella, Sycon, and Spongilla are some of its examples.
They are free-living or parasitic animals.
Organisms like Hydra are solitary.
1. Porifera:
2. Coelenterata:
3. Platyhelminthes:
4. Nematoda:
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