I am going to say
C. Energy contained in the nucleus of an atom
C. The force is a constant change, because her position on the Ferris wheel will constantly change. I believe this is the answer, but use sources to double check. I might use different vocab. then your teachers.
Answer:
Action: Gravity pulls on the ball.
Reaction: The ball falls to the ground.
Explanation:
the answer is B 4-6 months thats when they can pick up large objects.