What are some examples of items in the columbian exchange?

The information box says that the han added 4,000 miles of wall.refer to the mileage scale.how can this be true?

Which piece of information would most a historian create an interpretation of this photograph of works in a factory?

In terms of territory won in the french and indian war, which of the following is a true statement? a. england won the most territory as a result of the war. b. france won the most territory as a result of the war. c. spain won the most territory as a result of the war. d. england, france, and spain all won an equal amount of territory as a result of the war.