The four characteristics of a healthful diet are adequacy, balance, moderation, and

a) calories
b) color
c) value
d) variety

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. commercial sales2. social media3.movies containing drugs and or parties.

It doesn't state that he washed his hands before or after preparing this poultry. even though he had it in seperate bags the bacteria from the poultry could have entered the vegtables because of a lack of handwashing. so cross-contamination is a very possible answer.   

Ibelieve the answer is microorganisms within the body develop mutations, so d.hope i you out : )