You are presented with the quiz "powering a TV receiver with battery requires a path for electricity to flow through 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 "snow is actually electrical noise that is generated by the TV receiver and other electrical devices". 

So, what's the best answer to the question?


 

 closed circuit          