Answer:
punisher
Step-by-step explanation:
-Reinforcer refers to something that will increase the chances that a situation will happen again.
-Punisher refers to receiving a penalty for doing something that is wrong.
-Conditioned stimulus refers to something that causes a learned response by being associated with a natural event.
According to this, the answer is that the traffic fine is a punisher for Sam's behavior of speeding as it is a penalty for doing something that is forbidden.