* Frictional Force: This force arises from the contact between the surfaces of the hands. The microscopic irregularities on the skin interlock, creating resistance to movement. This resistance is what allows the hands to grip and shake without slipping apart.

* Electromagnetic Force: While electromagnetic forces are fundamental to the interactions of matter, they are not the primary force at play in shaking hands. Electromagnetic forces are responsible for:

* Holding atoms together: The electrons in atoms are held by electromagnetic forces, and these forces ultimately bind the molecules that make up your hands.

* Friction itself: The electromagnetic interactions between the atoms of the skin surfaces cause the frictional force. However, the force we directly perceive is the friction, not the underlying electromagnetic interactions.

In summary: While electromagnetic forces are involved at a fundamental level, the force we experience directly when shaking hands is frictional force.