You are presented with the question "the flow of current in what is moved up and down?" and the following answer choices: 
- an electrical storm
 - Veins and arteries.
 - mouth of rivers
 - a short circuit
 - an electrical circuit
 - circulatory systems
 - bad wiring
 - a hydraulic system

Now knowing that aswitch is used to start the flow of current in an electrical circuit and each switch is moved up for on, and down for off, choose the best answer.


 

     an electrical circuit    