You are presented with the question "What causes an object to combust?" and the following answer choices: 
- heating liquids
 - friction
 - It gets heated up
 - incineration
 - heat energy
 - flow of electrons
 - Electrical energy
 - Energy.

Now knowing that high temperatures can cause an object to combust and incineration requires very high temperatures for efficient combustion, choose the best answer.


 

    incineration     