The model that BEST represents Newton's third law of motion is:
A. A person in a boat rowing a paddle in the water.
This example illustrates Newton's third law because when the person pushes the water backward with the paddle (action), the water pushes the boat forward with an equal and opposite force (reaction). This is a clear demonstration of the action-reaction pair described by the law.
The other options do not clearly represent the concept of action and reaction in the same way.