What is a major food source for humans?
Options:
- (A) poison dart frogs
- (B) honeybees
- (C) barnacles
- (D) intervertebrates
- (E) other humans
- (F) photosynthesis
- (G) the body's largest organ
- (H) Most plants
Hmmm, let me think. I don't want to be wrong, so I got to be careful.
Mollusks are a major food source for other organisms, including humans. Mollusks are invertebrates and are no exception. Intervertebrates are a major food source for other organisms, including humans. The answer: (D).