Select the primary storage area for napkins, straws, and take-out bags.

The primary storage area for napkins, straws, and take-out bags is the dry storage area. These items are typically paper or plastic and do not require refrigeration or freezing since they are non-perishable. The dry storage area provides a controlled environment that helps in keeping these supplies organized and easily accessible, ensuring that they remain clean and usable when needed for customer service.

Other storage areas, such as walk-in freezers or refrigerated areas, are designed for perishable goods that need to be kept at specific temperatures to prevent spoilage or foodborne illnesses, making them unsuitable for storing items like napkins and straws. Countertop storage, while useful for quick access to items in customer service, does not provide an adequate place to store larger quantities of supplies in an organized manner. Hence, the dry storage area is the most appropriate and effective choice for these items.