The correct response is: It was the movement of plants, animals, and people from America to Europe, and from Europe to America.
The Columbian Exchange refers to the widespread transfer of plants, animals, culture, human populations, technology, diseases, and ideas between the Americas and the Old World (Europe, Asia, and Africa) following the voyages of Christopher Columbus in the late 15th century. This exchange had profound effects on the world, influencing agriculture, diets, and even societal structures in both hemispheres.