Answer:
Extinction
Step-by-step explanation:
When you are conditioning a living being, you often need to give them a treat or a motivation to do something that you desire them to do, while she was giving her puppy a treat the puppy was greeting her all the time, not because he wanted to greet her, but because the puppy wanted the treat, as soon as she stopped giving the puppy the treat the puppy starts to loose that conditioning because of the lack of stimuli and the condition gets extinct.