Answer:The largest biome in North America is <u><em>A, the Tundra.</em></u><em> </em>
Explanation: In North America, there are a total of 6 biomes. The largest Tundra is located in the Rocky Mountains in Colorado. The Coniferous Forest (Taiga) is the 2nd largest biome that is located in North America. The other biomes in North America are grassland, deciduous forest, desert, and the tropical rain forest.
Heating is still done largely by burning fuels, like it has been in the past, although people now have central heating to circulate the warm air throughout the house. Some people use electric heaters and people used to use cool water to cool their houses. Now people use electric air conditioners.