Answer:
secondary reinforcer for staying awake.
Explanation:
Secondary Reinforcement: In psychology, the term "secondary reinforcement" is determined as a specific situation in which a particular stimulus tend to reinforces an individual's behavior after it has become formerly associated with a stimulus or "primary reinforcer" that is responsible for satisfying basic survival instincts, for example, drink, sleep, food, and clothing, etc. However, a secondary reinforcer can be considered as helpful or not-helpful.