While I don't have access to a specific chart or the details of the Colombian exchange you are referring to, I can provide general insights into why manioc (also known as cassava) is a staple food in West Africa.
Manioc is favored in West Africa for several reasons:
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Adaptability to Climate: Manioc is a drought-resistant crop that thrives in poor soils and can grow in various climates, making it a reliable food source in regions where other crops might fail.
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Caloric Density: Manioc is rich in carbohydrates, providing a significant source of energy for communities that rely on it as a staple food.
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Versatile Use: It can be processed in various ways, including the production of flour, starch, and fermented products, making it versatile for different culinary applications.
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Historical Introduction: Manioc was introduced to Africa from South America through the Columbian Exchange, and it became well-suited to the African agricultural environment, leading to its widespread adoption.
In summary, people in West Africa eat manioc because it is resilient, nutritious, versatile, and historically significant as a crop that was successfully integrated into their agricultural practices.