Choose the word which is different from the rest.

The answer is E. Mast.

Oyster, clam, scallop, and mussel are all bivalve mollusks, while a mast is a vertical pole that supports a sail on a boat or ship.

Bivalve mollusks have two shells that are joined together by a hinge. They use their shells to protect themselves from predators and to filter food from the water. Oysters, clams, scallops, and mussels are all edible and are considered to be seafood.

A mast is a vertical pole that supports a sail on a boat or ship. It is typically made of wood or metal and is often decorated with flags or other ornaments. Masts are an important part of sailing vessels and help to provide power and stability.