When electricity flows to a light bulb , the light bulb will turn on, and an electric current is a flow of electric charge. Given these facts, what can turn a lightbulb on among the following options:
- Electric current
 - cigarettes
 - Shining a flashlight on it
 - hydrogen and oxygen
 - Unplugging the lamp
 - direct energy
 - Sunlight
 - heat energy


 

 Electric current        