Which one of the following reflects back more sunlight as compared to other three?

Solution (By Examveda Team)

Land covered with fresh snow reflects back more sunlight as compared to other three. Fresh snow and ice reflect 80 - 85% of the sunlight. Therefore, the skin of skiers is irradiated by sunlight from all sides, since the snow does not take up the light but reflects it and remains cold. Scientists give a name to this ability of surfaces to reflect light.