You are presented with the quiz "What are invertebrates such as common garden pests with shells?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "mollusks are invertebrates such as the common snail" and "slugs Slugs, a common Garden pest, are snails without a shell". 

So, what's the best answer to the question?


 

   mollusks        