The Columbian Exchange describes the interaction between the Americas and the rest of the world that occurred as a result of European exploration in
the 15th and 16th centuries. One of its most important outcomes was the
spread of new plants, animals, and diseases across the Atlantic Ocean. For
instance, potatoes spread from the Americas to Europe, while Europeans
brought the first horses to the Americas. Which of the following historical
themes is applicable when studying this aspect of the Columbian Exchange?
A. America in the world
B. Culture and society
C. Politics and power
D. Environment and geography