What must be ensured during night driving regarding visibility?

During night driving, ensuring adequate lighting is crucial for safety. Visibility is significantly reduced when it's dark, making it difficult to see other vehicles, pedestrians, and road signs. Using headlights appropriately helps illuminate the road ahead, allowing drivers to gauge distances and reaction times effectively. It's essential to adjust the brightness of your vehicle's lights and use high beam headlights when there is no oncoming traffic and the road conditions permit it. This practice not only enhances your visibility but also increases your awareness of potential hazards on the road.

The other options present practices that can be unsafe or unnecessary. Keeping all lights off would drastically limit visibility, making driving at night extremely dangerous. Using fog lights in all conditions can be inappropriate, as they are specifically designed for poor visibility due to fog, rain, or snow and can blind other drivers when used improperly. Lastly, adjusting the seat height, while important for comfort and visibility in general driving, does not specifically address the critical need for visibility during nighttime driving.