Bart used to go to his health club every day after work because he almost always saw abigail there. for two full weeks abigail wasn't at the club when bart went there for his workout, and now bart has stopped going to his health club. this example illustrates the operant conditioning process of
a) resistance
b) avoidance
c) punishment
d) extinction

Extinction

Explanation:

There is some reason behind it that when a person or an animal stops doing some task that they were daily working that task. What is the reason behind this phenomenon? Extinction is one the explanation for it. Extinction is in psychology to weakening a response that is in results in the extinction of behavior or decrease of a behavior. Or on the other hand, we can say that the behavior becomes to stop.  

For instance, you taught your dog to shake hands but after some time you stop rewarding the dog the behavior will stop eventually and dog stop behavior.

a factory opens that mass-produces light bulbs.

explanation:

not sure if that's an answer to your questions but this is an example! : )