I believe it is the Sumerian.
Anglo-Russian Entente, (1907) pact in which Britain and Russia settled their colonial disputes in Persia, Afghanistan, and Tibet. It delineated spheres of influence in Persia, stipulated that neither country would interfere in Tibet's internal affairs, and recognized Britain's influence over Afghanistan.France and Russia
Answer:
It is called the Columbian Exchange because of Christopher Columbus' widespread transfer of culture, plants, animals, human populations, technology, diseases, and ideas between the Americas, West Africa, and the Old World. This happened between the 15th and 16th centuries
I hope that this helps