Fast food outlets rely heavily on convenience products. These products are pre-prepared or semi-processed, making them easy to cook or assemble quickly, which is crucial for the fast-paced nature of the industry.
- Contemporary products generally refer to modern or new products, but this is not specific to the fast food industry.
- Functional products refer to products designed to serve a particular function, but they are not specific to fast food.
- Fresh products may be used in some fast food outlets, but they are often more time-consuming to prepare compared to convenience products.
Thus, the correct answer is Convenience products.