In which area of the world is the process of leaching very intensive and quick?

Correct answer: (a) Moist tropical region

Explanation

Leaching, the washing of soluble minerals down out of the soil, is fastest in moist tropical regions. High temperatures and heavy rain speed up chemical weathering, and the constant downward flow of water carries away bases such as calcium and potassium and much of the silica.

What is left is a poor soil rich in iron and aluminium oxides: laterite. The process is called laterisation.