Concept:In deserts, the dominant weathering process is physical or mechanical weathering, caused by temperature changes and wind.
Explanation:Deserts are hot and extremely dry, receiving very little rainfall.
As a result, moisture-dependent processes like chemical and biological weathering occur very slowly or are absent.
Physical weathering is the main process because of the great difference between day and night temperatures.
Rocks heat up by day and cool rapidly at night, leading to repeated expansion and contraction.
This constant stress makes rocks crack, peel, and break into smaller pieces.
Wind carrying sand particles also erodes and smooths rock surfaces through abrasion.
Thus, mechanical disintegration dominates over chemical alteration in desert landscapes.
Answer:C. physical