Fact 1: Producing thrust causes something to move.

Fact 2: All rockets generate thrust by igniting an mixture of fuel and 'oxidiser'.

Given the two facts above, answer the question "What causes a rocket to move?" with the following options: 
- flow of electrons
 - Electrical energy
 - expansion into a vacuum
 - magma
 - kinetic energy
 - igniting fuel and oxidiser
 - pulsars
 - heat is produced


 

      igniting fuel and oxidiser   