Pull ups exercise / grow which muscle in the body?

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)

Answer compression tablet;

Answer the two types are hsv-1 oral herpes causes cold scores around the mouth or face; hsv-2 this type is generally responsible for genital herpes outbreaks;

Answersuicide;