Concept:Cocoa (
Theobroma cacao) is a tropical crop that thrives in hot, humid climates with high and well-distributed rainfall.
Explanation:The plant naturally grows in tropical lowland rainforests.
It requires warm temperatures, high humidity and fertile, well-drained soils.
These conditions are best met in the humid rain forest zone.
Savannah zones have long dry seasons and low humidity, so they are unsuitable.
Mangrove swamp forests have saline and waterlogged soils, which are also unsuitable.
Therefore, the humid rain forest zone is the most favourable belt for cocoa cultivation.
Answer:B. humid rain forest zone