So that it does not spoil, mold, or get stale.
Most food should be bagged or airtightly sealed so that doesnt happen
throw it out the can has a leak and air exposure caused gas to develop inside
Aside from thinking that the spider might have contaminated the food somehow, there would be no reason for tossing the food out. If the food has been properly sealed, there should not be a contamination issue.
If the can was unopened, and thaws out, still sealed, at room temperature, there should be no problem with it.
Chocolate should last longer in better-sealed, airtight containers, much like any other food. Keeping chocolate in a sealed tin should extend the freshness much longer than bar left out in the open.
No food safety person would ever recommend that you consume an item that should be kept refrigerated when it has been left out for 3 days. Toss it out.
Generally vacuum-sealed foods swell due to microbial growth in the food.
Food handlers should maintain a clean and tidy kitchen by promptly cleaning spills and crumbs, as these attract pests. They should also store food in sealed containers and regularly check for signs of infestations. Ensuring proper waste management, such as using tightly sealed trash bins and disposing of waste regularly, is crucial. Additionally, sealing cracks and gaps in walls, windows, and doors can help prevent pests from entering the kitchen.
as far as I know, all granite should be sealed.
I believe you should read through your lectures for Food Safety
Canning is a method of preserving food in which the food contents are processed and sealed in an airtight container.
Some meats and fruit can last years while also being frozen.