Which of the following would disappear first if an estuary was destroyed? a. shellfish b. whales c. coral reefs d. algae

The correct answer is shellfish.

Explanation:

Estuaries are places that found on the coast where freshwater like a bay or river met with the ocean. The great example of the estuary is Chesapeake bay estuary.

These are the habitat of the small fishes, shell fish or migratory birds are few of the animals.

This, the correct answer is option A. Shellfish.