Desertification is driven by several factors. Which of the following is NOT considered a driver in arid regions?

Desertification is driven by several factors. Which of the following is NOT considered a driver in arid regions?

• A. Urban sprawl
• B. Overgrazing
• C. Deforestation
• D. Drought

Answer: (D)

Desertification arises from a mix of processes that degrade land, especially where moisture is scarce. In arid regions, human activities such as removing vegetation or consolidating land use act as direct drivers that push soils toward irreversible degradation. Overgrazing wears away protective plant cover, exposing soil to erosion and reducing its ability to retain moisture. Deforestation removes the root networks and shading that protect soil, leading to greater runoff and soil loss. Urban sprawl encroaches on productive land, fragments ecosystems, and increases surface sealing, all of which undermine soil health and water infiltration. Drought, on the other hand, is a natural climatic fluctuation. It reduces available moisture and can intensify the effects of land degradation, but it is not a human-caused driver in the same way as the others. In other words, drought acts as a stressor that can accelerate desertification when combined with poor land management, rather than being a direct driver produced by human activity.

Desertification arises from a mix of processes that degrade land, especially where moisture is scarce. In arid regions, human activities such as removing vegetation or consolidating land use act as direct drivers that push soils toward irreversible degradation. Overgrazing wears away protective plant cover, exposing soil to erosion and reducing its ability to retain moisture. Deforestation removes the root networks and shading that protect soil, leading to greater runoff and soil loss. Urban sprawl encroaches on productive land, fragments ecosystems, and increases surface sealing, all of which undermine soil health and water infiltration.

Drought, on the other hand, is a natural climatic fluctuation. It reduces available moisture and can intensify the effects of land degradation, but it is not a human-caused driver in the same way as the others. In other words, drought acts as a stressor that can accelerate desertification when combined with poor land management, rather than being a direct driver produced by human activity.