When should a driver use their headlights?

The correct answer encompasses all scenarios where using headlights is necessary for safe driving. Headlights are crucial for enhancing visibility not just at night but also during conditions of reduced visibility such as fog, rain, or heavy snow. In these situations, headlights help illuminate the road and make the vehicle more visible to other drivers, thereby reducing the risk of accidents.

Driving with headlights on whenever visibility is compromised is a fundamental safety rule, as it allows drivers to see better and to be seen by others. This is particularly important during twilight hours, in adverse weather, or in areas where there may be poor lighting. By using headlights appropriately, drivers contribute to a safer driving environment for themselves and others.