What became a major food source in Africa because of the coloumbian exchange?

A major food source that emerged in Africa due to the Columbian Exchange was maize (corn). Introduced from the Americas, maize adapted well to various African climates and became a staple food, contributing significantly to food security and agricultural diversity across the continent. This crop, along with other introduced foods like cassava and sweet potatoes, transformed diets and farming practices in many African regions.