A light bulb will turn on when something generated from what flows to it?
energy gas sun SO2 copper Coal matter wind
A B C D E F G H
Coal-fired electric generation is a low cost source of electricity.
When something generated from coal flows to a light bulb, the light bulb will turn on.
A light bulb will turn on when something generated from what flows to it? (A) energy (B) gas (C) sun (D) SO2 (E) copper (F) Coal (G) matter (H) wind