Answer:
negative reinforcement
Step-by-step explanation:
Negative reinforcement is the type reinforcement that is strengthened by not allowing the negative outcome to continue. Negative outcome comes from aversive stimuli. The aversive stimuli causes discomfort to the person.
Here, the aversive stimuli is the beeping sound. Because of the discomfort the beeper sound causes we fasten the seat belt. Hence, this is a case of negative reinforcement.