The statement "The motion of an object is affected by friction" is true.

Here's why:

* Friction opposes motion: Friction is a force that resists the relative motion between two surfaces in contact. It always acts in the opposite direction of the intended motion.

* Slowing down objects: Friction causes objects to slow down and eventually come to a stop if no other forces are acting on them.

* Changing the direction of motion: Friction can also change the direction of an object's motion, for example, when a car turns a corner.

Therefore, friction plays a significant role in influencing the motion of objects.