Answer: the correct answer is C. hermit crab
Step-by-step explanation:
The difference is that the hermit crab uses a salvaged shell that is empty.
Most species have long, spirally curved abdomens, which are soft, unlike the hard, calcified abdomens seen in related crustaceans. The vulnerable abdomen is protected from predators by a salvaged empty seashell carried by the hermit crab, into which its whole body can retract.
Barnacles. This "barnacle zone" is the highest of the intertidal zones. Although they may look like mollusks with their shell-like covering, barnacles are actually crustaceans, related to lobsters, crabs and shrimp. They look like tiny shrimp in their larval stage, where they swim as members of zooplankton in the ocean
All chitons bear a protective dorsal shell that is divided into eight articulating aragonite valves embedded in the tough muscular girdle that surrounds the chiton's body. Compared with the single or two-piece shells of other molluscs, this arrangement allows chitons to roll into a protective ball when dislodged and to cling tightly to irregular surfaces. In some species the valves are reduced or covered by the girdle tissue.] The valves are variously colored, patterned, smooth, or sculptured.
Limpets are aquatic snails with a shell that is broadly conical in shape and a strong, muscular foot. Although all limpets are members of the class Gastropoda.
The common periwinkle or winkle (Littorina littorea) is a species of small edible whelk or sea snail, a marine gastropod mollusc that has gills and an operculum-