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

Fact 2: An electrical current is a flow of electrons.

Given the two facts above, answer the question "what can run through a wire causing it to heat up?" with the following options: 
- flow of electrons
 - electromagnetic energy
 - flow of neutrons
 - kinetic energy
 - hydrogen and oxygen
 - chemical messengers
 - flow of protons
 - h2o


 

 flow of electrons        