Which packaging method extends shelf life by controlling gas movement?

The correct choice is MAP, which stands for Modified Atmosphere Packaging. This packaging method is designed to extend the shelf life of perishable goods by altering the composition of the gases surrounding the food product within the packaging. By reducing the concentration of oxygen and increasing levels of carbon dioxide and nitrogen, MAP slows down the growth of aerobic bacteria and molds that contribute to spoilage. This controlled gas movement helps maintain the freshness, texture, and flavor of food items for a longer period compared to standard or traditional packaging methods, which typically do not modify the atmosphere inside the package and may allow for quicker degradation.

Other packaging methods, like standard or traditional packaging, do not significantly alter the gas composition and, as a result, may lead to more rapid deterioration of food products. Expiration packaging focuses mainly on labeling the shelf life without employing methods to control the gas composition, making MAP a superior choice for extending the freshness and safety of food products.