HeLp!! Explain the causes of the Columbian Exchange and its effects on the Eastern and Western Hemisphere.

The arrival of Europeans in the Americas brought more than a clash of peoples and cultures. It also brought a movement of plants, animals, and diseases between the Eastern and Western hemispheres. One result of the Columbian Exchange was the transfer of diseases from Europe to the Americas

Explanation:

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.