How do electronics affect children's minds?

According to some Scientist it shows that some kids have more talents and also focuses on school and understand things faster since they spend a lot of hours on electronics a day.

Aand b would both be correct

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)