What characteristic of packaging directly affects food safety?

The materials and sealing methods used in packaging are crucial for ensuring food safety. Packaging must be designed to protect food from contamination and spoilage, which can occur if the materials are not suitable or if the sealing methods are inadequate. For example, certain materials may be permeable to gases, moisture, or light, which can compromise the integrity of the product. Proper sealing methods ensure that the food is airtight, preventing the entry of pathogens and extending shelf life. This is particularly important for perishable items, where effective packaging can significantly reduce the risk of foodborne illnesses.

In contrast, factors like packaging color and design, brand endorsements, and price or marketing appeals do not directly influence the safety of the food itself, although they may impact consumer preferences and purchasing decisions.