A biome consists of all habitats of a community that form a similar ecosystem for a particular region. Taiga, represent the largest terrestrial biome and occurs between 50 and 60 degrees north latitudes. Tundra is the coldest of all the biomes and is the polar regions. The characteristics features of both Taiga ( Boreal or snow forest ) and Tundra biomes show that these can exist as neighbors. Thus, the correct answer is option B.