You are presented with the question "What is a food source for humans?" and the following answer choices: 
- trees
 - sugar
 - carbon dioxide
 - squid
 - rocks
 - plants
 - dirt
 - animals

Now knowing that mollusks are a major food source for other organisms, including humans and interestingly, a squid is also a mollusk, choose the best answer.


 

    squid     