On sunday afternoon, rick spent a couple of hours picking up discarded bottles and cans from a picturesque section of the wildlife refuge, even though he knew he would not get paid anything for his efforts. rick's motivation is best described as being.

"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?