What was a result of the Colombian Exchange?

• A. Decline in global trade
• B. World population explosion because of an increase of food
• C. Decrease in European population
• D. Isolation of the Americas

Answer: (B)

The key idea is how moving crops and foods between the Americas and the Old World changed people’s diets and populations. After contact, crops like potatoes and maize from the Americas spread to Europe, Asia, and Africa. These foods were highly productive and adaptable, giving larger, steadier calories per acre than many traditional staples. With more reliable and abundant food, populations could grow over time, contributing to a global population increase. That’s why the option describing a world population explosion due to more food is the best answer.

The other statements don’t fit because the Columbian Exchange generally increased global connections and trade, not reduced them; European and other populations did not drop because of the Exchange in the way the option suggests, and the Americas were not isolated but became more integrated into global networks.