Answer:
not gain interest
Explanation:
because they gain interest
The answer is a relapse. A relapse occurs when a person who has gone into recovery or has been sober for a long time goes back into abusing drugs and any addictive substances. This can also be seen in patients who had shown a period of health improvement goes back to deteriorating state.
Answer: Primary reinforcer
Explanation:
Primary reinforcer is the reinforcer that is used for fulfilling biological requirements or needs in the form of rewards. These reinforcers do not require pre-learning or potential .Example of primary reinforcer -food, water, shelter etc.
According to the question, treat is considered as primary reinforcer which is achieved by Fluffy because it satisfied his biological needs when he performed sitting activity as per Chris's command.