* Albedo is the reflectivity of a surface. Surfaces that reflect more light have higher albedo, while surfaces that absorb more light have lower albedo.

* Desert: Deserts have low albedo. The sand and rocks in a desert are dark and absorb a lot of sunlight, leading to high temperatures.

* Iceberg: Icebergs have very high albedo. Their white, reflective surfaces reflect a large percentage of sunlight back into the atmosphere.

* Wet field: Wet fields have a moderate albedo. While water itself reflects light, the soil and vegetation in a wet field can absorb some of the sunlight.

Therefore, a desert has the lowest albedo out of the three options.