Concept:Humid tropical weathering is mainly chemical because of high temperatures and heavy rainfall.
Explanation:In hot, wet regions, water and warmth speed up chemical reactions between minerals and rainwater.
Hydrolysis happens when water reacts with silicate minerals such as feldspar.
This reaction transforms feldspar into clay minerals and releases dissolved ions.
The process continues throughout the year because rainfall and warmth are abundant in humid tropical climates.
Therefore, hydrolysis deeply alters rocks like granite in these areas.
In contrast, exfoliation is more typical of dry or semi-arid regions, granular disintegration suits desert environments, and freeze-thaw occurs in cold highlands.
Thus, hydrolysis is the type of weathering most common in humid tropical areas.
Answer:C. hydrolysis