A puppy in the local shelter is carrying a bacterium in its feces. After Mark pets the puppy and allows the puppy to fick his face, he becomes infected with the bacterium and is now hosting the infection. What word describes Mark's role
in the spread of this infection?

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)

If this is a multiple choice give me the choices ! but id say  he always states the truth. unless its not a choice lol.-hope this : 3