You are presented with the question "what can run through a wire causing it to heat up?" and the following answer choices: 
- flow of electrons
 - electromagnetic energy
 - flow of neutrons
 - kinetic energy
 - hydrogen and oxygen
 - chemical messengers
 - flow of protons
 - h2o

Now knowing that electrical current running through a wire causes that wire to heat up and an electrical current is a flow of electrons, choose the best answer.


 

 flow of electrons        