How does desertification affect the productivity of soil?

Desertification extends beyond the expansion of existing deserts to include land degradation due to human activity in drylands. Land degradation destroys or reduces the productivity of the soil, and is caused by excessive and unsustainable activities such as deforestation, overgrazing, poor land management, soil salinization, and soil erosion.

Sure hope this helps you :D

i am positive it is c. condensing but i may be wrong

not only is it colder, it also becomes darker, less salty, and more dense.