What are the three major factors to ignite a fire?

I think we should have heat, fuel and oxygen to ignite a fire.

following are the main three factor of iginite a fire

oxygen

heat

fuel 

Three major factors are Heat, Oxygen & Fuel

For ignite fire needs heat,oxygen and fuel.

fire triangle which contains : 

O2 

spike 

material or fule 

Heat, Fuel and Oxygen. It is know as fire triangle 

Fuel

Weather

Topography

The above said three major facts to ignite a fire

TO INGITE A FIRE IT SHOULD HAVE CHEMICAL REACTION OF FUEL HEAT AND OXYGEN

Its combination of Fuel, Oxygen, and heat will give you fire

fuel,gas,heat and oxygen are three majjor factors to ignite fire in the bulding

It is belong's to Fire Triangle that is Oxygen, Fuel & Heat.