Question

when you are driving in fog,
you can see better by:
using the parking lights
using lower headlight beam
using upper headlight beam
switching beams frequently

Explanation:

When driving in fog, using the lower headlight beam is better. Parking lights are too dim. The upper headlight beam reflects off the fog particles and creates glare, reducing visibility. Switching beams frequently is not a standard or effective solution. The lower beam is designed to project light closer to the vehicle and at a lower angle, which helps in cutting through the fog without excessive reflection.

Answer:

Using lower headlight beam