Fact 1: Most mollusks have shells.

Fact 2: Mussels are bivalve mollusks.

Given the two facts above, answer the question "What do most mussles have?" with the following options: 
- Epidermis
 - ice
 - shells
 - snow
 - fur
 - names
 - a cuticle
 - alveoli


 

   shells      