Identify the animal that does NOT have bilateral symmetry.

Correct option is D

The correct answer is (d) Cnidarian.
 Annelida: Animals in this phylum, such as earthworms and leeches, exhibit bilateral symmetry.
 Molluscs: Members of this phylum, including snails, clams, and octopuses, generally exhibit bilateral symmetry.
 Arthropoda: This phylum includes insects, spiders, and crustaceans, all of which exhibit bilateral symmetry.
 Cnidarian: This phylum includes animals like jellyfish, corals, and sea anemones. Many Cnidarians, especially jellyfish, exhibit radial symmetry rather than bilateral symmetry. Radial symmetry means their body parts are arranged around a central axis.