1. Arctic Tundra: The Arctic tundra is the coldest of the four ecoregions and covers the northernmost part of North America, including Alaska, northern Canada, and Greenland. The tundra is characterized by permafrost, low temperatures, and a lack of trees.
2. Temperate Deciduous Forest: The temperate deciduous forest is found in the eastern half of North America, stretching from the Atlantic Ocean to the Great Plains. This region is characterized by deciduous trees, which lose their leaves in the fall, and a moderate climate.
3. Grasslands: The grasslands, also known as the Great Plains, are located in the central part of North America. This region is characterized by vast stretches of grasses and few trees.
4. Deserts: The deserts are located in the southwestern part of North America and include the Mojave, Sonoran, and Chihuahuan deserts. These regions are characterized by high temperatures, low precipitation, and a lack of vegetation.
