Final answer:
An example of extinction is when an individual stops buying lottery tickets after spending several hundred dollars and never winning.
Step-by-step explanation:
An example of extinction from the given options is C) You stop buying lottery tickets after spending several hundred dollars and never winning. Extinction in biology refers to the event when all the members of a species die out and no more members remain. In this case, the individual stops engaging in the behavior of buying lottery tickets because they have not been rewarded with a win and have experienced the cost of spending money without receiving any positive reinforcement. This behavior ceases to exist, leading to a form of extinction.