Which of these was a positive effect of the Columbian exchange eight and introduction of horse to the New World be the introduction of disease into the New World see the introduction of slavery into the New World the conflict and where fair between European settlers and Native Americans

A. introduction of the horse to the New World

Explanation:

The positive effect of the Columbian exchange is the "introduction of horses to the New World."

Unlike the other available options, the introduction of horses to America ensures the American Indians are exposed to horses which have so many benefits to the people at the time, including a means of transportation. It is later used together with Cart to improve the transportation system in the New World.

The options are adverse effects of the Columbia exchange.

the answer is b. osage.

b) race riots in several cities