Here's the breakdown:

* Newton's Third Law: For every action, there is an equal and opposite reaction.

* Force Pair: This means whenever one object exerts a force on another object (the "action"), the second object exerts an equal and opposite force back on the first object (the "reaction").

* Equal and Opposite: The forces are equal in magnitude (strength) and act in opposite directions.

Examples:

* You push on a wall: You exert a force on the wall (action), and the wall exerts an equal and opposite force back on you (reaction).

* A book resting on a table: The book exerts a downward force on the table (action), and the table exerts an upward force on the book (reaction).

* A rocket launching: The rocket expels hot gases downwards (action), and the gases exert an upward force on the rocket (reaction).

Important Note: The forces in a pair act on different objects. They don't cancel each other out because they act on different things. This is why things move when forces act upon them.