Right answer: La comida la recoges en el mesón y la llevas a tu mesa.
(You pick up the food at the big table and bring it to your table)
In these types of restaurants, you usually have to serve yourself the food and choose it, this is called self-service. Therefore there are no waiters.
The other options are incorrect because:
La comida la sirve un camarero en la mesa (The food is served by a waiter at the table) this statement is not according to the operation of a fast food restaurant
La comida tiene una excelente presentación (The food has an excellent presentation) Sometimes yes, sometimes no, it depends on the quality of the restaurant.
La comida ocupa varios ingredientes (The food is made of several ingredients) this is not a formal indicative of a fast food restaurant, practically all the meals are made of several ingredients, regardless of the type of restaurant.
