What common sources of ignition include electricity and failed wiring splices?

The correct choice is based on the fact that electricity, particularly in the form of sparks or overheating components, can ignite flammable materials. Failures in wiring splices can create shorts that lead to arcing or excessive heat, both of which can act as ignition sources.

Sparking metals, such as when an electrical current jumps a gap or when equipment produces sparks during operation, are direct sources of ignition in environments where flammable gases or combustible materials are present. Heat-generating equipment can also ignite materials through direct contact or by raising the ambient temperature to the point where combustion can occur.

Thus, understanding how electrical failures can lead to ignition is crucial for fire safety in environments where flammable substances are handled or stored. This highlights the importance of proper maintenance and monitoring of electrical systems to prevent potential ignition hazards.