The correct option is C Urchins
Urchin is a member of Echinodermata. It is a marine animal having the globe like shape with radial symmetry. Its body is covered with long spines for protection. They have tube feet with water canal system which is absent in Annelida. Annelida is a group of animals having segmented body without spines. Its body surface is covered by cuticles e.g., series, earthworm, and leech. Thus, the correct answer is option D.