What are three foods that spoil quickly when left in room temp?

Dairy products, such as milk, yogurt, and cheese, contain protein and fat that can quickly spoil when left at room temperature. The bacteria that cause spoilage grow rapidly at temperatures between 40°F and 140°F, so it's important to keep these foods cold.

Eggs

Eggs are also a good source of protein, and they can also spoil quickly when left out. The yolk of an egg is particularly susceptible to spoilage, so it's important to keep eggs in the refrigerator.

Meat and fish

Meat and fish are also perishable foods that can quickly spoil when left at room temperature. The bacteria that cause spoilage grow rapidly at temperatures between 40°F and 140°F, so it's important to cook meat and fish thoroughly and to refrigerate or freeze any leftovers.