Which method can effectively help in reducing food waste?

Encouraging customers to take leftovers home is an effective method for reducing food waste because it allows consumers to save any remaining food they do not finish during their meal. This practice not only prevents excessive food from being discarded but also promotes mindful eating and minimizes the amount of food that ultimately goes to waste. By offering takeaway containers and encouraging this behavior, establishments can contribute significantly to sustainability efforts while enhancing customer satisfaction.

In contrast, options involving discarding prepared meals, offering discounts on expired food, or storing food indefinitely would not promote effective waste reduction. Discarding meals leads directly to increased food waste, while expired food discounts can still encourage waste if the items are not consumed in time. Storing food indefinitely does not address the underlying issue of freshness and proper food safety, which is essential for maintaining quality and preventing spoilage.