The mixing of plants, animals, and microorganisms that occurred after Europeans arrived in the Americas is known as

A. the Columbian Exchange.
B. global interdependence.
C. triangular trade.
D. global mixing.

http://www.google.com/#q=Columbian+Exchange

The Columbian Exchange

The mixing of plants, animals, and microorganisms that occurred after Europeans arrived in the Americas is known as the Columbian Exchange. To determine the correct answer, you can either recall the term or use a process of elimination.

If you are familiar with the historical term "Columbian Exchange" and understand that it refers to the interchange of goods, ideas, and diseases between the Old World (Europe, Africa, and Asia) and the New World (the Americas), then you can confidently choose option A, the Columbian Exchange.

If you are not sure about the specific term but recall that there was significant mixing of different elements after European arrival in the Americas, then you can use the process of elimination:

- Option B, global interdependence, is a broader concept that encompasses various global connections and mutual reliance between nations or regions, but it doesn't specifically refer to the mixing of plants, animals, and microorganisms.
- Option C, triangular trade, is a term usually used to describe the trade system between Europe, Africa, and the Americas during the colonial period, which involved the exchange of goods and enslaved people. While it is related to the Columbian Exchange, it specifically refers to a specific trade route and does not encompass the entire mixing of plants, animals, and microorganisms.
- Option D, global mixing, is a generic phrase that does not capture the specific historical context of the European arrival in the Americas.

Therefore, after careful consideration and elimination, the correct answer is A, the Columbian Exchange.