The answer is "Giovanni—aversive conditioning; Hans—systematic desensitization".
Aversive conditioning is when the subject is all the while presented to a stimulus (specific conduct) and inconvenience, because of which he begins partner the two and stops the said conduct.
Systematic desensitization is a behavioral method whereby a man is slowly presented to a tension creating article, occasion, or place while being occupied with some sort of unwinding in the meantime keeping in mind the end goal to decrease the side effects of uneasiness.