A refrigerator is an essential household appliance designed to keep food and beverages cold. It works by removing heat from the interior, which helps slow down the growth of bacteria and preserves the freshness of perishable items. Most refrigerators have adjustable shelves, compartments for fruits and vegetables, and a freezer section for storing frozen foods. Refrigerators come in various sizes and styles, including top-freezer, bottom-freezer, and side-by-side models. They are typically powered by electricity and use a refrigerant to facilitate the cooling process. Modern refrigerators may also feature energy-efficient designs and smart technology, allowing users to monitor and control settings remotely.