Answer:
The correct answer is positively positively punished.
Step-by-step explanation:
Positive punishment is the aspect of punishment that focuses on increasing an individual's level of any specific unwanted behavior. The idea works by providing a certain negative effect once inappropriate behavior has been shown.
In the example, as the child is shy, he decides no longer to answer questions in class even though his answers could be the best, just because of the fact he doesn't want to go in front of the class -and be seen by everyone- to collect a reward.
This concept is part of psychologist and philosopher B.F. Skinner's Operant Conditioning theory.