Final answer:
Cold salads such as tuna should be stored in the refrigerator and consumed within a day. Leftovers that have been left between 4 and 60 degrees Celsius for more than two hours should be discarded to prevent foodborne illnesses.
Step-by-step explanation:
When making cold salads such as tuna, it is recommended that they should be stored in the refrigerator and consumed within a day. This is because perishable foods, like tuna salad, can spoil if left at room temperature for too long. Keeping them refrigerated helps to slow down bacterial growth and maintain freshness.
According to food safety guidelines, perishable leftovers should be refrigerated as soon as possible. Leftover foods left at a temperature between 4 and 60 degrees Celsius (40 and 140 degrees Fahrenheit) for more than two hours should be discarded to avoid the risk of foodborne illnesses.