You enroll your preschool-age daughter in ballet class. at first, all of the children in the class are clumsy, and their movements are awkward. after several months of weekly lessons, you notice that most of the children are moving smoothly through their dance routines, but your daughter’s movements are still rather awkward. you talk with the instructor and ask her if maybe your daughter isn’t cut out for ballet, and should you withdraw her from class. the instructor encourages you to have her continue. from what you’ve learned this week, what is a physiological basis for having your daughter continue?