Concept:Desert weathering is mainly driven by physical processes caused by extreme daily temperature changes and very low moisture.
Explanation:Desert regions receive very little rainfall, so chemical weathering, which depends on water, is greatly reduced.
Vegetation is also scarce, so biological weathering is minimal.
The dominant process is physical weathering, caused by the intense heating of rocks during the day and rapid cooling at night.
Rocks expand when heated and contract when cooled.
This repeated expansion and contraction creates stress, causing rocks to crack, peel, or break apart over time.
Since no chemical change occurs, the rock breakdown remains purely mechanical in nature.
Therefore, the predominant process of weathering in desert regions is physical weathering.
Answer:D. physical