Final answer:
The sign for "Boss" in American Sign Language involves tapping the index finger on the forehead.
Step-by-step explanation:
The part of the body that is touched when making the sign for "Boss" is the forehead. In American Sign Language (ASL), the sign for "Boss" involves tapping the index finger of the dominant hand on the forehead. This gesture symbolizes the idea of someone being in a position of authority or leadership.