Answer :
Final answer:
The wood exerting an equal and opposite force on the hammer.
Explanation:
In the situation where a hammer drives a nail into a piece of wood, the action-reaction pair is option D) The wood exerting an equal and opposite force on the hammer.
According to Newton's Third Law of Motion, for every action, there is an equal and opposite reaction. When the hammer exerts a force on the nail, the nail exerts an equal and opposite force back on the hammer. This pair of forces is the action-reaction pair in this situation.