Final answer:
Standing in line is NOT an example of a formal norm within the U.S.
Step-by-step explanation:
Formal norms are established rules of behavior that are written down and have explicit consequences for noncompliance. Of the options provided, standing in line is NOT an example of a formal norm within the U.S.
Standing in line is an example of an informal norm or a casual behavior that is generally and widely conformed to. Informal norms dictate appropriate behaviors without the need for written rules.
Examples of formal norms within the U.S. include paying taxes, wearing business attire at work, and not interrupting someone when they are speaking.