How did contact between the Western Hemisphere and Europe change through the exchange of plants animals and pathogens?

The contact between the Western Hemisphere and Europe initiated a transformative exchange known as the Columbian Exchange, which significantly altered agriculture, diets, and ecosystems on both sides. Crops like potatoes, tomatoes, and maize were introduced to Europe, enhancing food security and nutrition, while horses, cattle, and pigs were brought to the Americas, reshaping indigenous lifestyles and economies. However, this exchange also included pathogens, leading to devastating epidemics among Native American populations who had no immunity to diseases like smallpox and measles. Overall, this contact fostered profound cultural, economic, and environmental shifts globally.