Final answer:
When visibility is poor in bad weather, it is important to use headlights on your car to improve visibility.
Step-by-step explanation:
When visibility is poor in bad weather, it is important to use headlights on your car to make it easier to see ahead. Headlights provide additional light on the road, increasing your ability to see obstacles, other vehicles, and pedestrians. By turning on your headlights, you not only improve your own visibility, but also make your vehicle more visible to others.