Available options: (a). power an electrical device (b). disconnect (c). move to different locations (d). heat is produced (e). matter vibrating (f). photosynthesis (g). fuel cell (h). preventing heat transfer
Given those answer options, answer the question: You are presented with the quiz "Electron flow allows a battery to do what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "powering an electrical device with a battery requires a path for electricity to flow through a closed circuit" and "an electric circuit is a closed path for electron flow". So, what's the best answer to the question?
A:
(a).