Lavonne hates to listen to new age music. Whenever Lavonne refuses to clean her room, her mother makes her stay in her room and plays new age music through the intercom. Her mother tells Lavonne that as soon as she finishes cleaning her room, the music will be stopped. The removal of the unpleasant music is an example of:

"six months ago, several of molly's friends joined the trimtime fitness center. each of them participated in trimtime's weight-reduction and fitness regimen. all reported substantial weight reduction, and all are visibly slimmer. molly is convinced. she joins trimtime and enrolls in the program, hoping and expecting to see the same results. she is especially delighted to learn that trimtime had adjusted its program to make it even more effective in a shorter period of time." what is the feature in question/attribute of interest in this argument?