Explanation:

- Tapeworm belongs to:

- Option 2: Platyhelminthes (also known as flatworms).

- Explanation of Tapeworm Classification:

- They are flat, elongated worms residing in hosts' intestines.

- Tapeworms are parasitic and lack a digestive system, absorbing nutrients directly.

- Explanation of Other Options:

- Option 1: Annelida:

- Comprises segmented worms like earthworms and leeches.

- They have a body segmented into rings.

- Option 3: Porifera:

- Known as sponges.

- They lack tissues and organs, living in aquatic environments.

- Option 4: Coelenterata:

- Also known as Cnidaria.

- Includes jellyfish and corals, known for a simple body with stinging cells.

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