The coach has not seen improvement as expected in his team and plans to change the practice session. To give the players more opportunity for skill practice he lengthens practice and uses the fitness principle of... A. frequency
B. tedium
C. time
D. specificity

D. Specificity

Explanation: Because it is an actual fitness principle!

The principle of specificity states that sports training should be relevant and appropriate to the sport for which the individual is training in order to produce the desired effect. Additionally, training should progress from general conditioning to specific training for the particular skills required in that sport or activity.

Essentially, specificity training means that you must perform the skill in order to get better at it. It is the principle behind that old saying, "practice makes perfect."

well when looking at this if you think about it   negativley and positivley   react with each other and when the first layer gets full they add layers it starts with 2 on the first layer and it constantly goes on until the official number is there