Which of the following foods should be categorized as ready-to-eat?

Ready-to-eat foods are those that can be consumed without any further cooking or preparation, which makes them convenient and immediately safe for consumption. Cooked chicken salad fits this definition perfectly because it is a dish that has already undergone a cooking process (the chicken is cooked), and it is prepared for immediate use. Once prepared and combined with other ingredients, it doesn't require any additional cooking before serving.

In contrast, raw fish and raw vegetables are not considered ready-to-eat since they either require cooking or specific handling, such as washing for raw vegetables, to be safe for consumption. Cooked pasta, while it is cooked, may still require additional ingredients or heating before being served as a dish on its own, and therefore does not fit the exact definition of ready-to-eat as clearly as cooked chicken salad does.