Which of the following is a health measure taken by the national government to improve public health?
a. providing better health facilities to underdeveloped counties
b. thoroughly checking food products before they are sold in the market
c. checking sanitation and clean water supply in your community

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)

1.controls blood flow2.controls oxygen flow3.carries oxygen rich blood to veins

Answercontrolled substances security manual;