From The Art and Popular Culture Encyclopedia
In general terms, eating (formally, ingestion) is the process of consuming nutrition, i.e. food, for the purpose of providing for the nutritional needs of an animal, particularly their energy requirements and to grow. All animals must eat other organisms in order to survive: carnivores eat other animals, herbivores eat plants, and omnivores consume a mixture of both.
Manners are an important aspect of social eating in almost all human societies.