Shaking hands when you meet someone is an example of a/an: Formal Norm kleology Informal Norm

The correct answer is:<br /><br />**Informal Norm**<br /><br />### Explanation:<br />Shaking hands when you meet someone is a socially accepted behavior that is not formally codified into laws or official rules. It is an example of an **informal norm**, which refers to unwritten social rules and expectations that guide behavior in everyday interactions.