Explanation:

- Option 1: Phylum - Porifera

- Includes sponges.

- They lack true tissues and are primarily filter feeders.

- Option 2: Phylum - Protozoa

- Comprises single-celled organisms.

- Often free-living, some are parasitic.

- Option 3: Phylum - Ctenophora

- Known as comb jellies.

- Features include rows of cilia for movement.

- Option 4: Phylum - Cnidaria

- Encompasses jellyfish, corals, and sea anemones.

- Characterized by stinging cells called cnidocytes.

- Correct Answer: Jellyfish belong to this phylum.

Your answer is right.