Answer:
Negative reinforcement
Explanation:
In negative reinforcement a behavior or response is strengthened by removing, or stopping a negative outcome. In other words, negative reinforcement occurs when a present situation of circumstances is removed as a result of an individual's behavior, hence creating a favorable or good outcome for the person.
In this case Michael's son whined and complained to move his father to put a movie in the DVD player, he is most likely going to use this technique some other time, to achieve this result.