What is the primary purpose of using low beam headlights in fog?

Using low beam headlights in fog is important primarily because they provide better visibility without causing glare. When driving in foggy conditions, the moisture suspended in the air scatters light. High beam headlights can reflect off the fog, rain, or snow and create a blinding effect, making it difficult for the driver to see and for others to see the vehicle. Low beam headlights are designed to cast a shorter, more directed beam of light that penetrates through fog and illuminates the road directly ahead, enhancing safety by improving visibility while minimizing reflective glare.

The other options, while they may sound relevant, do not accurately convey the primary function of low beam headlights in foggy conditions. For instance, signaling other drivers, protecting headlights, or making the vehicle more recognizable have secondary implications but do not address the critical need for visibility when navigating through fog.