African colonies and the importance of productive farmland

Which five British African colonies were most important?

South Africa, Egypt, the Gold Coast and Nigeria are named first; Rhodesia is selected for a contested fifth place, with Kenya also raised for its agriculture.

The list starts with South Africa, Egypt, the Gold Coast and Nigeria. The fifth place is explicitly described as disputed among several candidates. Rhodesia is chosen for its productive agricultural land and its role as a grain-producing area. A guest adds Kenya as another agricultural example. This is an informal selection rather than a comparison using a stated common measure.