Which of the following is NOT one of the main geographic First Nations groups in Canada?

The classification of First Nations in Canada is commonly divided into four main geographic groups: Woodland, Plains, Pacific Coast, and Arctic. Each of these groups represents distinct cultural, linguistic, and historical traits associated with the geographic regions they inhabit.

The Woodland First Nations are primarily located in the eastern woodlands, encompassing areas in present-day Ontario and Quebec, known for their traditional practices and lifestyles influenced largely by the resources of the forested regions. The Plains First Nations inhabit the North American prairies, where their culture and social structure were historically linked to buffalo hunting and a nomadic way of life. The Pacific Coast First Nations are situated along the western coast of Canada, known for their rich maritime culture and art, including totem poles and advanced fishing techniques.

The designation of "Eastern FNs" does not represent a recognized geographic group among the main classifications, making it the correct answer in this case. This term is too vague and does not align with established nomenclature in Indigenous studies.