The most accurate response regarding the Columbian Exchange is:
Plants, animals, diseases, and people moved among continents.
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 Christopher Columbus's voyages in the late 15th century. This exchange had significant impacts on agriculture, economies, and populations on both sides of the Atlantic.