Final answer:
An implied warranty refers to the expectation that a restaurant's food will be safe and of a certain quality without any explicit promises, which falls under consumer protection laws.
Step-by-step explanation:
The concept that a restaurant must serve food that is fit to eat is known as an implied warranty. An implied warranty is a legal term used to describe the expectations that the products or services provided by a seller meet certain standards of quality. While no explicit promises are made, there is a basic understanding that the food will be safe and edible when a customer dines at a restaurant. This falls under consumer protection laws and affirms that the food should not cause harm and should be of a quality that is reasonably expected by a paying customer.