What groups in the Columbian exchange?

The Columbian Exchange facilitated the transfer of various groups, including plants, animals, and diseases, between the Old World (Europe, Asia, and Africa) and the New World (Americas). Crops like potatoes, maize, and tomatoes were introduced to Europe, while wheat, rice, and sugarcane were brought to the Americas. Additionally, animals such as horses and cattle were exchanged, transforming agricultural practices and lifestyles. However, the exchange also led to the spread of diseases like smallpox, which had devastating effects on Indigenous populations in the Americas.