When Mickey was five, he gave his mother a dead frog for her birthday. Mickey didn't understand why his mother didn't like her gift, because he thought the frog was cool. This represents what type of thinking?

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)

Ithink it’s d. that should be correct.