During a corner kick, if a Blue player prevents a goal by stopping the ball with his hand, what action should the referee take?

The situation described involves a player handling the ball to prevent a clear goal-scoring opportunity during a corner kick. In this context, the Laws of the Game stipulate that if a player deliberately handles the ball to prevent a goal, the referee is required to take significant disciplinary action, which typically includes sending off the player with a red card.

By showing a red card, the referee effectively indicates that the offense is not only a foul but also a serious breach of the rules that warrants the player being removed from the game. This is crucial to maintain fair play and uphold the integrity of the game, as handling the ball in such a manner directly impacts the outcome of a potential goal.

While other actions may indicate various levels of misconduct, they do not adequately address the seriousness of preventing a goal through deliberate handball. Therefore, issuing a red card is the correct and necessary action in this scenario.