Mollusks are a major food source for other organisms, including humans, and mollusks are invertebrates and are no exception. Given these facts, what is a major food source for humans among the following options:
- poison dart frogs
 - honeybees
 - barnacles
 - intervertebrates
 - other humans
 - photosynthesis
 - the body's largest organ
 - Most plants


 

    intervertebrates     