My opinion is to stay with your friend and trust you instincts
B fashionable means following the latest style
Answer:
Negative Reinforcement
Explanation:
A behaviour can be reinforced by simply rewarding it. However, this is called positive reinforcement. On the other hand, rewarding a behaviour by removing something negative such as home chores is called negative reinforcement. From the example, the kid is spared from doing the chores by increasing piano playing.