Here's why:

* Friction is a contact force: It arises from the interaction between the surfaces of two objects in contact. The microscopic irregularities on these surfaces interlock and resist relative motion.

* Direct contact is required: For friction to occur, the objects must be physically touching. There's no "force field" or energy transfer across a gap.

* Examples:

* Pushing a box across the floor: Friction acts at the contact points between the box and the floor.

* Rubbing your hands together: Friction occurs where your skin surfaces touch.

Forces that act at a distance:

* Gravity: The force of attraction between objects with mass.

* Electromagnetism: Forces involving charged particles and magnetic fields. These can act over distances, but they still rely on interactions between particles.

In summary: Friction requires physical contact between surfaces, making it a non-distance force.