Answer:
Extinction
Explanation:
When a person or animal starts to stop engaging in the previously learned task. It is called extinction. Extinction is related to vanished a conditioned behavior. On the other hand, it is said that the conditioned behavior eventually gets stopped.
For instance, we can say that when our dog starts to stop shake hands because of our lack of response. The behavior will gradually stop.
Thus in the above question, John cries much less frequently than he used to because of extinction.