Question

what are the three essential components of fire

Answer 1

Forest fires always start by one of two ways - naturally caused or human caused. Natural fires are generally started by lightning, with a very small percentage started by spontaneous combustion of dry fuel such as sawdust and leaves. On the other hand, human-caused fires can be due to any number of reasons. Some classifications include smoking, recreation, equipment, and miscellaneous. Human-caused fires constitute the greater percentage of forest fires in our forests, but natural fires constitute the great majority of the total area burned. This is because human-caused fires are usually detected early in their duration, and therefore they are usually contained easily. 

Answer 2

carbon dioxide and oxygen are the essential components of Fire