"<span>Introduction of American plants such as maize to Europe" is the only option that was a part of the Columbian exchange, since this exchange revolved primarily around the exchange of goods from the New World to Europe. </span><span />
I think it's the western and eastern fronts.
Apr 19, 1775 – Sep 3, 1783
Answer:
It made travel more affordable. It increased racial conflicts. production to increased.
Explanation: