What is a source of ignition of a fire?

A source of ignition for a fire can include anything that produces enough heat to ignite flammable materials. Common sources include open flames, such as matches or lighters, electrical sparks from faulty wiring, hot surfaces like stovetops, and friction from materials rubbing together. Additionally, static electricity or chemical reactions can also serve as ignition sources. Proper safety measures can help prevent these ignition sources from leading to unintended fires.