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

Fact 2: Interestingly, a squid is also a mollusk.

Given the two facts above, answer the question "What is a food source for humans?" with the following options: 
- trees
 - sugar
 - carbon dioxide
 - squid
 - rocks
 - plants
 - dirt
 - animals


 

    squid     