What was the Columbian Exchange?

Explanation below.

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The columbian replace began the prompt Christopher Columbus sat foot in u . s . a . of america, the replace coated each and every thing, sickness, options, animals, flowers, recognize-how, as a count number of reality it really is nonetheless taking position well-known

It was the exchange of goods, ideas, animals, and diseases between Europe and the New World.

They call it that because it was started after Columbus discovered the Indies.

It was when they traded food, cattle, and things of that nature. And to your second question I believe they called it that because they were columbian

The trade of goods, people, and diseases between Europe, the Americas, and Africa.