How did the Columbian Exchange change world diets?

A. New crops like potato and maize spread हुए / New crops like potato and maize spread

Step 1: Identify the concept: this is food exchange. Step 2: Crops from the Americas reached Europe, Asia and Africa and changed diets. Step 3: Remember Columbian Exchange with potato and maize.

Step 1: concept पहचानें: यह food exchange है। Step 2: Americas से crops Europe, Asia और Africa तक पहुंचे और diets बदलीं। Step 3: Columbian Exchange को potato and maize से याद रखें।