In clear weather, a bright light can be seen for a long distance. In conditions of heavy fog, the visibility is greatly reduced. Which of the following explains the reduced visibility?

Choose from: + Light is refracted by water vapor in the air.. + Light is scattered by water droplets in the air.. + Light is absorbed by water vapor near the ground.. + Light is reflected by water droplets on the ground..
Light is scattered by water droplets in the air.