Atherapist indicates that a client no longer has to record his daily activities if he can maintain a sober lifestyle. this is an example of: positive reinforcement negative reinforcement extinction punishment

The answer is Positive Reinforcement. It is the addition of a reward following a desired behavior. In this case, the client no longer have to record his daily activities if he maintain a sober lifestyle. It occurs when a desirable event or stimulus is presented as a consequence of a behavior and the behavior increases.