Four elements

The four elemental bending arts are based on the four classical elements, water, earth, fire, and air, each being manipulated through certain martial art styles that are reminiscent of the qualities of the element itself. Bending is traditionally performed through the motions of one’s hands and feet, but certain benders are able to effectively manipulate their element with only minimal movement of their body, such as by using just their head or torso. In even rarer cases, benders are able to perform their bending without the aid of any physical movement at all, by instead using sheer focus and force of will, a skill known as psychic bending.