Fire Triangle - it is a simple model for understanding the necessary ingredients for most fires, also known as combustion triangle
"Blue" for oxygen
"Red" for heat
"Green" for fuel
Fuel - something that gives nourishment. Any combustible matter used to maintain fire, as coal, wood, gas, oil, or chemicals in order to produce heat or power.
TYPES OF FUEL
TINDER - includes small twigs, dry leaves, needles or forest duff.
KINDLING - consist of small sticks, typically less than one inch around.
FIREWOOD - is only larger piece of wood and is what will keep your fire going long into night.
FIRE RING - is a construction or device used to contain campfires and prevent them from spreading and turning into wildfires.
BONFIRE - large open-air fire used as part of a celebration, for burning trash, or as a signal.