Answer:
snail and slug and nudibranch are gastropods
the clam and oyster are bivalves and the octopus and the nautilus are cephalopods
Step-by-step explanation:
cephalopods have 4 groups which are the 8 armed octopus and ten armed squid and cuttlefishes and the shelled chambered nautilues
bivalves have laterally compressed bodies enclosed by a shell and gastropods are commonly known as snails and slugs from saltwater and freshwater and from the land