Salmonella, mainly.
To try and remove, dirt, germs, and bacteria, from the food. It is not necessary to wash all food before eating it, but, some food needs to be washed, such as fruit because it will be safer to eat that way.
Some foods do not need to be cooked fully, for example, tomatoes can be eaten raw or cooked - or anywhere in between. Other food, such as chicken, must be cooked completely to kill any bacteria in the flesh. The bacteria can cause food poisoning, salmonella or even e-coli.
there are some food like fruits and some vegetable that you do not need to cook,but some food like non veg ,it will be harm free by cooking.because some of the food we can't eat raw so we have to perfactly cook the food before going to eat.
some food items are cooked as all of the food items cannot be eaten raw and taste bad without being cooked and we also cook to make our food tasty and delicious to eat
Food is cooked no differently than at any time of year. We just use some different ingredients (only food that is kosher for Passover) and those who are observant will use different sets of pots and pans, dishes, etc.
A Dumpling is a cooked food that floats in soup,because it is lighter than the liquid it dislpaces.
Dusty Keister likes his food overcooked, rather than having spice put on the food. To earn his bonus, one of his cooked items must be in the red area. Note that with only Dusty Keister, you can get a "Perfect" rating for the cooked food, even when it is in the red area. At some point past the green area, the food will go from "good" back to "perfect". This is when you know it has been cooked enough. I am unsure of how to impress him if he orders something which does not require cooking (such as guacamole). I'm guessing that you can't.
Because of Density.
There is air in the food. So, it floats
Food that is cooked by fully or partially submerging in some type of heated fat.
Cooking food does offer some advantages, although it is possible to survive on a diet of uncooked food if it was reasonably chosen. Cooked meat is not only more digestible, but also is less likely to contain harmful bacteria, since cooking kills bacteria. Even if you prefer not to eat meat, there are vegetables and grains which also become more digestible when they are cooked. There are also fruits and vegetables which do not need to be cooked and are better if they are not cooked.
According to some, charcoal grills give food a smokier taste than those cooked on gas. However this is debatable and is only a matter of taste which varies between different people.