Physical activity

a: reduces fat
b: promotes strong bones
c: gives you energy
d: all of the above

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)

Starvation is bad because it makes your body unhealthy. if you don’t have a healthy diet you can age faster or even die before you’re 30.