What is the signal for a personal foul called?

The signal for a personal foul in basketball is indeed indicated by a raised hand above the head. This gesture is universally recognized among officials to signify that a personal foul has occurred. When a referee raises their hand high, it communicates effectively to players, coaches, and spectators that a player has committed a foul, allowing the game to flow smoothly while ensuring everyone is aware of the foul call.

In the context of the other options, while a whistle blow is typically used to stop the game, it does not specifically signal a personal foul. The tap on the opposite shoulder is not associated with fouls; it is a different signaling method used for other calls. A clenched fist, on the other hand, is typically used to signal a technical foul rather than a personal foul. Thus, the hand raised above the head is the correct signal for indicating a personal foul in the game of basketball.