Final answer:
Larval stages like nauplius, zoea, and cypris are found in crustaceans, which include lobsters. The correct answer to which organism do larval stages of animals like lobsters, clams, and 'his' belong is option (2) Crustaceans.
Step-by-step explanation:
The larval stages nauplius, zoea, and cypris are associated with the early development of crustaceans. Lobsters, as an example given in the question, go through these larval stages, specifically the zoea stage. Crustaceans belong to a large group of arthropods that include approximately 52,000 species, many of which are aquatic, such as shrimp, lobsters, and crabs. They are the dominant aquatic animals and have important ecological roles, often serving as the main source of energy in marine ecosystems. While mollusks also have a larval stage called trochophore, they are not the focus concerning lobsters and clams.
Therefore, the correct answer is option (2) Crustaceans, which include lobsters, shrimps, crabs, and crayfish, and are characterized by various larval stages such as nauplius, cypris, and zoea during their life cycle. This highlights the diversity of arthropods and their adaptability to different environments from ocean to freshwater, and even terrestrial habitats.