Which of the following indicates that a vehicle is moving toward you?

The correct choice indicates that the vehicle is likely a train or another type of vehicle equipped similarly, which uses headlights to signify its approach toward you. Headlights are specifically designed to illuminate the path ahead and increase visibility for both the operator and any potential obstacles or pedestrians. The presence of amber hosting lights typically works in conjunction with headlights to alert individuals, especially in situations where extra caution is needed.

Flashing lights and a loud horn can indicate a vehicle is near, but without specific identification, they may not necessarily indicate that the vehicle is moving directly toward the observer. A stop sign is directed toward activities related to halting and does not convey movement towards a person or object. Reflective barriers are meant for safety and navigation guidance but do not inherently suggest the direction a vehicle is traveling. Thus, the headlights—particularly in a context relevant to trains or similar vehicles—are a clear and direct indicator of approach.