The Columbian Exchange
The columbian exchange is when they transfer goods people humans and diseases.
This is the map that shows you how they trade from the new world to the old world and that is called the columiban exchange.
horses help the new world by traveling to get them place to place and they also help them on the farms.
Tomatoes help the old world because it the new world have not send them to the old world they would not have the pasta sauce.
if we did not have sugar can the new world would not have any sugar and we could not make any kool aid.