Explanation:
D
Cnidocytes are specialized cells that are found in the phylum cnidaria (sea anemones, jellyfish, corals and hydras). They contain an "explosive" organelle called cnidocyst that acts as a 600 millionyears-old microscopic injection system and is important for prey capture and anti-predator defense.
(a) Trophocytes - In sponges, these cells involved in the digestion and distribution of food.
(b) Myocytes-Myoytes are elongated, contractile cells, which surround canal openings and pores can contract to regulate flow through the sponge.
(c) Archaeocytes-These cells are totipotent, they have ability to change into all of the other types of sponge cells.
