Answer:
The Columbian Exchange transported plants, animals, diseases, technologies, and people one continent to another. Crops like tobacco, tomatoes, potatoes, corn, cacao, peanuts, and pumpkins went from the Americas to rest of the world.
Answer: Control of ports gave European countries control of products and revenues and could be staging grounds for military offensives or defensive action against hostile powers.
Explanation: Imperialism was a system based on a mother country extending its influence over its foreign satellites.
Lincoln means that the United States is unconstitutional if slavery is not abolished. He means to say that preserving the Constitution is abolishing slavery and that this would only bring progress to the United States. Keeping slavery would only wreck the United States.
