The answer to your question is B. stressor.
A stressor is an event or situation that causes a strain on your body or mind.
Exercise and physical activity fall into four basic categories—endurance, strength, balance, and flexibility. Most people tend to focus on one activity or type of exercise and think they're doing enough. Each type is different, though. Doing them all will give you more benefits. Mixing it up also helps to reduce boredom and cut your risk of injury.
Though each type is described separately, some activities fit into more than one category. For example, many endurance activities also build strength. Strength exercises also help improve balance.
Endurance- dancing
Strength- Lift weights
Balance-standing on one foot
Flexibility-yoga
Answer:
Positive reinforcement.
Explanation:
Positive reinforcement is a method in psychology, that refers to the introduction of a <em>desirable or pleasant stimulus after the behavior.</em>
Desirable stimulus reinforces the behavior, which makes it more likely that the behavior will reoccur in the future.
In this case, Joe's boss allowed him to leave early because he did a good job that day, so he got to finish his shift early and enjoy his free time. His boss is hoping that he will continue to do good work due to his generous act.