You are presented with the question "What causes a rocket to move?" and the following answer choices: 
- flow of electrons
 - Electrical energy
 - expansion into a vacuum
 - magma
 - kinetic energy
 - igniting fuel and oxidiser
 - pulsars
 - heat is produced

Now knowing that producing thrust causes something to move and all rockets generate thrust by igniting an mixture of fuel and 'oxidiser', choose the best answer.


 

      igniting fuel and oxidiser   