Final answer:
The Arctic tundra is located north of the boreal forests within the Arctic regions of the Northern Hemisphere and is partly in Canada. It is a cold biome with perma frost and a short growing season, best characterized by extreme winter temperatures and minimal vegetation.
Step-by-step explanation:
The article specifies that the Arctic tundra is located north of the subarctic boreal forests and is predominantly found within the Arctic regions of the Northern Hemisphere. It doesn't specifically mention being inside any country or particular area, but generally lies within the Arctic Circle. However, considering the other given options, the answer that fits most closely is Canada, since the country occupies a significant portion of the North American Arctic region. This region comprises vast and cold landscapes with little vegetation and consists of the tundra biome, where no trees can grow because of the semi frozen ground and perma frost. The Arctic tundra is marked by extreme cold with an average winter temperature of -34°C (-29.2°F) and a very short growing season for plants of approximately 10-12 weeks, where there can be almost 24 hours of daylight during the summer.