Mollusks live in most terrestrial, freshwater, and marine habitats, and clams are mollusks that live in the sea or in freshwater. Given these facts, what lives in most terrestrial, freshwater, and marine habitats among the following options:
- Birds
 - humans
 - clams
 - sharks
 - life
 - ecosystem
 - amoeba
 - edible


 

   clams      