Dora has agreed to go skydiving with her boyfriend to him celebrate his 30th birthday, but she is absolutely terrified to do so. the morning of the big jump she wakes up and reports that she cannot feel or move her feet. she is upset by this, and her boyfriend takes her to the hospital. doctors in the emergency room cannot find anything physically wrong with her. after the time for the sky-dive has passed, dora's feeling of her feet seems to return without explanation. this could be 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?