Concept:The Guinea Savanna zone has crops suited to its dry, grassy conditions.Explanation:Cocoa, cola, plantain, and oil palm are mainly forest-zone crops.Shallots are grown more in coastal areas, while cassava is common in forest and transitional zones but not a main Guinea Savanna crop.The Guinea Savanna supports hardy grain and legume crops such as millet and groundnuts because they need less rainfall than forest crops.Therefore, the pair that grows well in the Guinea Savanna is millet and groundnuts.Answer:A. millet and groundnuts