Final answer:
To communicate that you're turning right while driving, you must extend your left arm out horizontally and point your hand and fingers to the right.
Step-by-step explanation:
To communicate that you're turning right while driving, you must use the hand signal of extending your left arm out horizontally and pointing your hand and fingers to the right.
This hand signal is universally recognized and helps to ensure the safety of both the driver and other road users.
By using this signal, you indicate your intention to turn right, allowing others to anticipate your movements and make necessary adjustments.