You are presented with the question "An electric stove transforms electrical energy into what?" and the following answer choices: 
- friction
 - warmth
 - boiling
 - waves
 - photons
 - engines
 - Light
 - food

Now knowing that an electric stove transforms electrical energy to heat energy and heat is also produced by friction, or mechanical energy, chemical energy, and electrical energy, choose the best answer.


 

 friction        