Canning is best described as which of the following?

• A. The process of drying foods in the sun
• B. The process of heating meat to cook it
• C. The process of grinding grains into flour
• D. The process of preserving food by heating and sealing it in airtight containers for storage

Answer: (D)

Canning is about preserving food by destroying microorganisms and keeping them out by a sealed container. The heat treatment kills bacteria, yeasts, and molds that cause spoilage, while sealing the jar or can creates an airtight environment that prevents new microbes from entering. That combination gives long-term storage safety without refrigeration. This is different from drying foods in the sun, which removes moisture but isn’t about aseptic sealing for storage, cooking meat to eat, or grinding grains into flour. If the food is properly processed, high-acid foods can be preserved with water-bath canning, while low-acid foods require pressure canning to reach temperatures that kill more resistant organisms.