What is one of the main reasons for using turn signals?

Using turn signals is primarily about communicating your intentions to other drivers on the road. When you activate your turn signals, you are informing other drivers and pedestrians of your planned maneuvers, such as turning at an intersection or changing lanes. This communication is critical for preventing accidents and ensuring a smoother flow of traffic. By signaling, you create a safer driving environment for everyone by allowing other road users to anticipate your actions and adjust accordingly.

While indicating a lane change is a specific application of turn signals, the broader purpose is indeed to alert all road users about your intentions, making option B the most comprehensive and accurate reason for using them. The other choices focus on aspects that do not align with the primary safety goal of signaling, as beautifying a vehicle or increasing speed has no relevance to safe driving practices.