What is the correct hand signal for a left turn?

The correct hand signal for a left turn is the left arm extended straight out. This signal is standardized and widely recognized, making it clear to other drivers and pedestrians that you intend to turn left. Using this hand signal is important for ensuring safety on the road, as it communicates your intentions when you may not be using your vehicle's turn signals, especially in situations where they might be malfunctioning or if you're on a bicycle or motorcycle.

The other choices represent different hand signals: raising the left arm above the head indicates a right turn, while the right arm extended out signals a right turn as well. Raising the right arm above the head is also used to signal a right turn or could indicate a stop, depending on the context. Understanding these signals is vital for safe driving and proper communication with other road users.