Answer:
Sub-Saharan Africa
Explanation:
One-commodity countries are defined as country that depend on one principle export for more earnings.
Sub-Saharan Africa in Africa has the most one-commodity countries where 89% of countries are there that are commodity-dependent. While other regions the Middle East and North Africa, only 65% of countries depend on commodities.
Hence, the correct answer is "Sub-Saharan Africa".
