Answer with Explanation:
Miko's situation above is related to "Newton's Third Law of Motion." This law states that every action is reacted by something equal and opposite (reaction) in direction. This means that if you push an object, the force (action) will be reacted by another force (reaction force) that is equal and opposite in its direction.
A balloon has a trapped air inside of it. Once the air is released, as in the situation above when the balloon slipped out of Miko's hand, a force is exerted upon it and this is called the "action." When the balloon moved forward it exhibits the "reaction force." This causes it to accelerate.
This law of motion is being used to describe the propulsion of objects, other than the balloon. One example of this is the rocket and its engine.