(B) Laterite soil
Heavy rainfall causes intense leaching, forming Laterite soil. After proper soil conservation in Karnataka, Kerala and Tamil Nadu, it is useful for growing tea and coffee.
Source: Resources and Development, Laterite Soil
---
The passage directly states: "This soil is the result of intense leaching due to heavy rain… this soil is very useful for growing tea and coffee." Alluvial soil supports wheat/paddy; Black soil supports cotton; Red soil forms due to iron diffusion — none match the flowchart clues of heavy rainfall + leaching + tea/coffee.