If had not been for the columbian exchangewe would not have the things we have today and the same thing would be for Old. World
Some products like tomatoes comes from the New World (North and South America). Things that come from the New World like tomatoes make the Old World Italy famous like tomato sauce.
The old world brought diseases.
Livestock came from the old world to the new world.We would not have meat.
The old world got things like tobacco and the new world got things like olives.
Sugar cane came from the old world made things sweet like cake.