Adog rolls over and receives a treat. the dog rolls over again. this is an example of

This is an example of Positive reinforcement.

Positive reinforcement is the addition of a reinforcing stimulus (giving the dog a treat) following a behavior (rolling over), that makes it more likely that the behavior occurs again.

Learned Behaviour

Explanation:

The dog has learned that if it rolls over, it will get a treat. It is not instinct nor is it inherited.