Fact 1: Most mollusks have shells.

Fact 2: Mollusks are the second-largest invertebrate group.

Given the two facts above, answer the question "what do the second-largest invertebrate group have?" with the following options: 
- shells
 - a cuticle
 - insects
 - barnacles
 - animals
 - tortoises
 - alveoli
 - honeybees


 

 shells        