Final answer:
In fog, use low beams for better road illumination without causing glare. High beams make visibility worse by reflecting off the fog, and hazard lights should not be used while moving.
Step-by-step explanation:
During fog, the type of headlights you should use on your car are low beams. High beams are not recommended because they shine light directly into the fog, causing a glare that can reflect back and worsen visibility. Instead, low beams project the light down towards the road, which is less likely to reflect off the fog and offers better illumination of the road surface. Using hazard lights is not advised while driving in fog because it might indicate to other drivers that you are parked or in distress rather than actively driving.