You are presented with the quiz "What do heat coils convert into heat energy?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "atoaster converts electrical energy into heat energy for toasting" and "constraints The heating coils in the toaster require 120 VAC at about 10 amps". 

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


 

     Electrical energy      