Final answer:
Weathering is deepest in the humid tropics, where the warm and wet conditions facilitate both chemical and physical weathering processes.
Step-by-step explanation:
Weathering is deepest in the humid tropics. The high temperatures and consistent rainfall in these regions contribute to intense chemical weathering processes. In comparison to other areas like high latitudes, ocean floors, mid-latitudes, and high altitudes, the humid tropics experience more intense weathering due to the combined effects of heat which accelerates chemical reactions and moisture that aids in both chemical and physical breakdown of rocks.
The humid tropics receive a high amount of precipitation and are characterized by rich biodiversity and high levels of endemism. Consequently, these regions have not just the greatest species richness but also extensive weathering processes due to the presence of plentiful water for chemical reactions and physical erosion. Moreover, the warm climate means these processes can continue year-round without interruption from freeze-thaw cycles that might occur in colder regions.