some restaurants are a chain, meaning that there are restaurants which have the same name and serve the same food. mcdonald's, burger king, and pizza hut are examples of chain restaurants that are all over the world. these restaurants serve fast food, that is, inexpensive food, prepared and served quickly. at some, you do not have to even get out of the car to eat. you can pay and get your order from a window. these places are called drive-throughs.