Q: You are presented with the quiz "completing a circuit causes _ to flow through that circuit" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "completing a circuit causes electricity to flow through that circuit" and "an electrical current is a flow of electrons". So, what's the best answer to the question?

OPT: (a). heat energy (b). pulse (c). heat (d). photons (e). complete (f). energy (g). Heart rate (h). electrons
The answer is:
(h).