What action should a server take when a customer enters a red zone?

When a customer enters a red zone, it indicates that they are exhibiting signs of intoxication or are close to overconsumption. In such a scenario, the server must prioritize the safety and well-being of the customer, as well as the policies regarding responsible alcohol service. Stopping service and removing alcohol is the appropriate action because it proactively prevents further intoxication and addresses concerns about the customer's health and behavior.

By taking this step, the server mitigates potential risks, such as alcohol-related incidents or health emergencies. It also aligns with responsible service practices, which emphasize the importance of monitoring alcohol consumption and intervening as necessary to prevent over-serving. Offering food can be beneficial in certain situations, but it does not address the immediate need to stop serving alcohol once a customer has entered the red zone.