Question Options:
1) punishment by the removal of a reinforcer (comfortable toilet seat)
2) punishment by the presentation of an aversive condition
3) reinforcement by the presentation of a reinforcer
4) reinforcement by the removal of a reinforcing condition.
Answer: punishment by the presentation of an aversive condition
Explanation: Contingency is an occurrence that happens by chance.
While an aversive condition is the use of a punishment to stop a behaviour.
So, in relation to the question, whenever the professor hops from his seat, he gets pinched because the toilet seat is cracked, this can be related to aversive conditioning.