You are presented with the quiz "What can change the movement of something or have it remain stationary?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "if two balanced forces act on an object in opposite directions then that object will remain stationary" and "pushes and pulls can change the movement of an object". 

So, what's the best answer to the question?


 

        pushes and pulls   