Final answer:
Foods need to be chilled or frozen to stay fresh because it inhibits bacterial growth and slows down spoilage. Refrigerating food helps maintain freshness by keeping it below 40 degrees F and freezing food below 0 degrees F preserves its quality.
Step-by-step explanation:
Foods need to be chilled or frozen to stay fresh. When food is chilled or frozen, it inhibits bacterial growth and slows down the spoilage process. Refrigerating food helps to keep it at a temperature below 40 degrees F, which inhibits bacterial growth and maintains its freshness. Similarly, freezing food at temperatures below 0 degrees F stops microbial growth and can preserve the food's quality.