Fact 1: Mollusks are a major food source for other organisms, including humans.

Fact 2: Mollusks in the diorama include snails and clams.

Given the two facts above, answer the question "What are a major food source to organisms including humans?" with the following options: 
- leeches
 - earthworms
 - snails
 - plants
 - tapeworms
 - trees
 - potatoes
 - bushes


 

   snails      