The era where many plants, animals, diseases, and people were exchanged between the Old World and New World was called the
Exchange.
European
Cortez
Columbian

The correct answer is Columbian Exchange

Explanation:

From the XV to the XVI century multiple European countries focused on colonizing territories in the Americas. This led to the interaction between Europea colonists and native people in the Americas which cause a massive exchange of plants, diseases, culture, ideas, animals, etc. between them. Also, this exchange increased when colonists brought African people as slaves to the continent. This exchange is known as the Columbian Exchange named after Christopher Columbus who was one of the first European colonists in America.

the french gave their support to another tribe during he war.