Answer: d. The ball being swung backwards before being released
Step-by-step explanation:
"A" and "B" are examples of stationary energy - where they have no movemnt
"C" is kinetic energy - this is an object's motion
"D" is potential energy - full of stored energy; this is an object that is about to be in motion, and typically come before Kinetic (simple terms)
This is where the ball is at it's highest peak; full of energy
In the image the energy "out" and "in" are kinetic.