Answer:
A force creates an opposite reaction and so the rocket is propelled forward from the thrusting of its engines.
Step-by-step explanation:
Newton's third law of motion states that a force will have an opposite and equal reaction. For example, you punching a sandbag will give that sandbag a dent made from the force, but it will also hurt your hand because it gave an equal force. This applies the same with rockets, gas is burned and thrusted out of the rocket to create an opposite force to propel it forward.