Concept:Crops that naturally grow well in high-rainfall areas are those adapted to the humid forest belt.
Explanation:Cocoa, oil palm, and rubber need heavy, well-spread rainfall throughout the year.
These crops are mainly cultivated in the tropical rainforest zones.
Cotton, millet, groundnut, cowpea, maize, and guinea corn tolerate drier or moderate rainfall conditions.
They cannot survive easily in constantly wet, high-rainfall areas.
So, the correct group of crops for high-rainfall regions is cocoa, oil palm, and rubber.
Answer:D. Cocoa, oil palm and rubber