Answer:
Negative reinforcement
Explanation:
B.F Skinner has been described as the term negative reinforcement. In the negative reinforcement, the researcher increases the behavior of the subject by stopping, removing, and avoiding the negative outcomes of the stimulus. It is about subtraction something from the environment.
Thus here in the above situation, a student studies because of avoiding the bad feelings related to the low grades in the test. So the studying behavior has been increased by negative reinforcement.