Which food item is an excellent example of a low-fat dairy product

Skim yogurt, fat free, etc

Low-fat (1%) or fat-free (skim) yogurt, cottage cheese, or milk.

Neufchatel or “light” cream cheese or fat-free cream cheese.

Fat-free American cheese or other types of fat-free cheeses.

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)