In which location was the land purchased for the National FFA Headquarters?

The National FFA Headquarters was established in Alexandria, Virginia, where the land was purchased to create a space dedicated to agricultural education and leadership. This site was chosen for its historical significance and proximity to Washington D.C., facilitating engagement with national policymakers and enhancing the organizational mission of fostering agricultural education and leadership among youth.

The other locations listed, such as Atlanta, Chicago, and Columbus, did not serve as the headquarters for the National FFA and are not associated with the organization's pivotal moments in establishing its national identity and influence. Thus, Alexandria remains significant as it is the correct choice for the location of the National FFA Headquarters.