5. Choose the two positives of the Columbian exchange Native Americans spread diseases to European explorers
Europeans introduced horses, livestock, guns and the wheel to native society
Europeans unknowingly brought many deadly diseases to the New World
Europeans brought back native crops (potato, corn, beans, etc) to Europe leading to better nutrition

Europeans introduced horses, livestock, guns and the wheel to native society.

Europeans brought back native crops (potato, corn, beans, etc) to Europe leading to better nutrition.

Explanation:

Columbian Exchange refers to the meeting of new world or western hemisphere of Earth that is America with old world or eastern hemisphere, consists of Europe, Africa, and Asia.

With this Columbian exchange, there was some positive and some negative aspects. positive aspects of columbian exchange include:

Negative aspects include:

because he created electricity

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.