Arule in youth sport might state that everyone must play in the game. however, one coach plays certain players of lower ability for only a couple of minutes each game so the team has a better chance of winning. this action violates the concept of

This action violates the concept of FAIR PLAY.

Explanation:

Fair play comprises different values that encourages treating individuals in a fair manner during the game and after the game, it also applies in actual how we treat people on daily basis.

This means a fair competition where there is no cheating during the game , where each team mates respect each other and their opponents, it encourages treating every team player with equality in such that everyone get the same chance to play for the team,tolerating each others weakness , caring for each team member without choosing favourites, and teaching fair values in the field and out of the field.