What caused the export of new food crops to the old world?

The export of new food crops to the Old World was primarily driven by the Columbian Exchange, which followed Christopher Columbus's voyages in the late 15th century. This exchange facilitated the transfer of crops like potatoes, tomatoes, and maize from the Americas to Europe, Africa, and Asia. The increased agricultural diversity and the introduction of high-calorie foods contributed to population growth and changes in culinary practices in the Old World. Additionally, European exploration and colonization expanded trade routes and demand for new agricultural products.