Fact 1: Completing a circuit causes electricity to flow through that circuit.

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

Given the two facts above, answer the question "completing a circuit causes _  to flow through that circuit" with the following options: 
- heat energy
 - pulse
 - heat
 - photons
 - complete
 - energy
 - Heart rate
 - electrons


 

        electrons 