What is the exchange?

What is exchange value and medicine of exchange

All sorts of things. Lots of animals for one. Pigs, horses, sheep, cattle(cows), goats etc. Plants and crops were the other big thing. Potato and corn were the biggest. along with tomato beans...

Naksan-Some of the exchanges of the Columbian Exchange were the horses, potatoes, tomatoes, corn, pepper, eggplant, sheep, llamas, alpacas, guinea pigs, pigs, turkeys, chocolate, peanuts, pumpkins,...

It is named after Christopher Columbus. His arrival in the Americas began the exchange of plants, animals, and diseases between the Western and Eastern Hemispheres that had previously only existed on...

I had some similar problems some days ago but I couldn't solve it immediately. What is more only today I have found a not bad solution for this proposition, which would aid too.