Final answer:
The correct statement is that the force is directed towards the center of the circle, which aligns with the principles of centripetal force and acceleration in uniform circular motion.
Step-by-step explanation:
When considering a ball tied to a pole, making a circular movement at a constant speed, the true statement regarding the ball is that the force is moving toward the circle's middle. This is because objects in uniform circular motion experience an acceleration due to the change in direction of the velocity, despite the speed being constant. The acceleration that the object experiences is called centripetal acceleration, which points toward the center of the circular path. This acceleration is caused by a net external force known as centripetal force, and according to Newton's second law, the object will accelerate in the same direction as the net force, hence the centripetal force and acceleration both point towards the center of the circle.