Answer:
it is an area of functioning over which someone has legal authority to perform
<span>He helped formulate the colonists' grievances against the British government in the 1760s.</span>
I believe the answer is: Positive reinforcement
Positive reinforcement refers to a desired reward/stimulus that given to encourage an individual in doing a certain behavior.
In this case, music as something that jenny's crave and her craving is rewarded everytime she repeat the behavior of opening up the channel