What type of development is reading is important for a= physical b= intellectual c= emotional d= social

Imma says intellectual...
 Considering that intellectual deals with the Brain, skills, etc, I would say it is the best choice because reading helps in the development of the brain.

The answer id letter d 90 

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)