Newton's Third Law of Motion: "For every action there is an equal and opposite reaction." What is a force pair? Are they easy to identify?

A force pair is a couple of forces which are acting on any given body from opposite directions called action-reaction forces.

One can simply identify the force pair by identifying two objects which are interacting and by describing who is pushing whom and by identification of their drawing.

A book resting on table has two participants, a book applying force downwards due to gravity and the table pushing it away from the earth surface. These are action and reaction forces.

the answer is a and have a great day