What kind of organisms live in estuaries?

Fish, shellfish, and migratory birds are just a few of the animals that can live in an estuary.The Chesapeake Bay, as one example, includes several different habitats. There are oyster reefs where oysters, mud crabs, and small fish may be found.

The answer is b, as with an inference you make a statement with no evidence

Bees shall never produce milk no matter what but this is a joke and the answer is a breast that produces milk.