Newton's third law is about the interaction between objects.
When two objects interact they exert equal and opposite forces on each other.These forces must be of the same type and act on different objects.For instance a book placed on a table will feel a contact force. There is a force on the book by the table and an equal and opposite force on the table by the book. Both are contact forces.Examples of forces: gravitational, electrostatic, magnetic, normal contact force, frictional, tension, thrust.