She immediately swatted his hand away, her face growing red with annoyance. "I'll try to maintain a certain level of respect, but please refrain from touching me with those filthy hands of yours. God only knows where they've been." she wiped her face off with her sleeve, her nose wrinkling with disgust. "That's easy. Katon is one of the five basic elements. It is usually produced through means of jutsu rather than being manipulated from preconceived flames. It is performed by moulding superheated chakra inside the stomach before releasing it via the lungs and mouth. Though fire is the basis of this element, its use can vary from production of ash to even more creative techniques like Katon: Suyaki no Jutsu, in which the user creates flames inside of an oven. Katon is weak to Water and strong against Wind, but depending on the rank of a Katon technique, it can beat a lower level Suiton technique or be beaten by a high level Fuuton technique. Katon, though made from chakra, is very similar to actual Fire, creating steam when in contact with Water. Growing stronger when exposed to Wind. Creating smoke or noxious fumes when met with flammable objects. I'm sure that there is more, but i've dumbed it down to a rudimentary scale for your feeble mind to comprehend."