Final answer:
The hand signal of a driver's hand and arm being extended straight out indicates a left turn. It is a universal signal used to convey this intention to other road users.
Step-by-step explanation:
Extend your left arm straight out the window, palm forward. You can also point the fingers of your left hand to the left if that's what comes naturally to you. It's best to retract your arm only after you begin to make a safe turn. After all, your turn signals don't shut off until you're done turning.
The meaning of a hand signal when a driver's hand and arm are straight out is c) Left turn. This hand signal is one of the universal ways to show direction without the use of lights. When a driver extends their left arm out the window, keeping it straight and at shoulder level.
it indicates to other drivers and pedestrians that they intend to make a left turn. Understanding such universal road signs and hand signals is essential for safe driving and preventing misunderstandings on the road.