Why must you also drive with dipped headlight during the day when visibility is impaired by fog, rain or falling snow?

You answered correctly. When visibility is impaired by fog, rain, or falling snow, you must use dipped headlights during the day so that other road users can see you more easily. This increases safety by making your vehicle more visible in poor weather conditions. Using dipped headlights is not meant to let you drive faster or to see traffic signs from farther away, but specifically to ensure you are clearly visible to others on the road. Remember to always turn on dipped headlights in these situations to reduce the risk of accidents.