How does pastarisation preserve food?

Pasteurization preserves food by using heat to kill harmful bacteria, pathogens, and spoilage organisms without significantly affecting the food's quality. The process typically involves heating the food to a specific temperature for a defined period, effectively extending its shelf life and ensuring safety for consumption. This method is commonly used for dairy products, juices, and some canned goods, allowing for safe storage and reduced risk of foodborne illnesses.