Answer:
When Christopher Columbus discovered America in 1492, he brought many things in Spain from America, which was new to Europe. The exchanging of plants, animals, diseases and goods (manufactured) from New World to Old and vice versa is called Columbian Exchange. The term, Columbian Exchange is named after Christopher Columbus.Things from Europe include wheat, horses, sugar, cows, pigs as well as diseases; things exchanged by the Americas include corn, potato, tomato, tobacco, beans, etc.