What was the Columbian Exchange? How did it change the Americas? How d

What was the Columbian Exchange? How did it change the Americas? How did it change the rest of the world?

What will be an ideal response?

ANSWER
The ideal answer should include:
1. The Columbian Exchange was the transfer of people, animals, plants, and diseases that took place after European contact with the Americas.
2. The term emphasizes the two-way nature of the flow.
3. Europeans brought domesticated animals, new crops, and deadly diseases to the Americas.
4. A host of important New World crops were taken to Europe, Africa, and Asia.
5. The exchange had a profound impact on global populations, changing the planet and its inhabitants forever.