Fact 1: Electrical current running through a wire causes that wire to heat up.

Fact 2: If the wire heats up it can damage the insulation or cause a fire.

Given the two facts above, answer the question "electrical current running through a wire can damage the insulation or what?" with the following options: 
- an object
 - energy barrier
 - humans disturb it
 - cause electrical conditioning
 - cause a fire
 - critical organs
 - cause hair conditioning
 - cause new lines


 

     cause a fire    