You are presented with the question "what do the second-largest invertebrate group have?" and the following answer choices: 
- shells
 - a cuticle
 - insects
 - barnacles
 - animals
 - tortoises
 - alveoli
 - honeybees

Now knowing that most mollusks have shells and mollusks are the second-largest invertebrate group, choose the best answer.


 

 shells        