You wash your hands regularly and always before you eat. This is an example of A. advocacy. B. setting goals. C. risky behavior. D. practicing healthful behaviors.

This is an example of
D. Practicing healthful behaviors

The person who utilize the progression principle will keep adding the difficulty of the exercise that he's doing, while the person who does not, will only stay stagnant.  the person that utilize progression principle, will get a stronger endurance because now his body is conditioned to do harsher routines.{the answer was already on verified)