Which term includes snails and slugs with a spiraled shell?

Which term includes snails and slugs with a spiraled shell?

• A. Mollusk
• B. Gastropod
• C. Cephalopods
• D. Bivalve

Answer: (B)

Gastropods are the group that includes snails and slugs, and many have a spiraled shell. They are one of the major classes within the phylum Mollusca, distinct from cephalopods (such as octopuses and squids) and bivalves (like clams and oysters). Saying mollusk is too broad because it covers all these groups, not just snails and slugs with shells. Some gastropods, like many slugs, have no visible shell at all, but they’re still gastropods due to other shared features. So the term that includes snails and slugs with a spiraled shell is gastropod.