A dog uses its tongue to drink. A robin holds a branch with its feet. A chimpanzee digs for termites with a stick. A worm moves to the top of flooded ground.
I gave my students this multiple choice question: Which is a learned behavior?

Only one answer is correct among these 4 choices:
- A dog uses its tongue to drink.
- A robin holds a branch with its feet.
- A chimpanzee digs for termites with a stick.
- A worm moves to the top of flooded ground.

Could you tell me which one is correct?

A chimpanzee digs for termites with a stick.