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takes place in a fantasy world that is home to humans, fantastic animals, and spirits.civilization is divided into four nations the Water Tribes, the Earth Kingdom, the Fire Nation, and the Air Nomads. Each nation has its own natural element, on which it bases its society, and within each nation exist people known as "benders" who have the ability to control and manipulate the element of their nation. The four types of bending arts are waterbending, earthbending, firebending, and airbending.