Answer:
1. Pushed out Native American groups. (negative)
2. Columbian exchange, new crops, animals, ideas were exchanged. (positive)
Step-by-step explanation:
Native groups were pushed out of land they had lived in for thousands of years. Genocide was often used and many people were killed. Native tribes were even entirely wiped out.
Columbian exchange transferred, religion, ideas, crops, livestock, and many other things from the Americas to Europe and from Europe to America.