In which situations should you use your horn?

Using your horn is an important aspect of safe driving, primarily for communicating with other road users. The correct choice emphasizes situations where it's critical to alert others to your presence and ensure safety. When passing another car or a vehicle that may encroach on your lane, using your horn can warn the other driver of your approach and help prevent potential collisions. Additionally, if there is an animal near the road, sounding your horn alerts both the animal and nearby drivers, reducing the risk of an accident.

It's essential to use the horn judiciously and only in situations where communication is necessary to enhance safety. The other options suggest inappropriate or ineffective uses of the horn, such as using it at traffic lights or when experiencing anger, which can lead to road rage and escalate situations unnecessarily. Also, greeting other drivers with a horn can be confusing and is not a standard or accepted practice while driving. Proper use of the horn is about ensuring safety and clarity on the road.