The variable you would need to keep track of is hight
Answer:
B. Practicing soccer for the excitement of the game
Explanation:
Intrinsic motivation is a behavior which stems from activities which gives natural satisfaction. This can be just a smile or a sense of pride. The motivation is drawn from a sort of self worth achievement.
For extrinsic motivation, a price is attached for a feat achieved. This could be winning an olympiad, essay contest etc that comes with good reward.
From the options provided only practicing soccer for the fun or excitement of it fits into the meaning of what intrinsic motivation portrays. Others are as a result of extrinsic motivation.
