Picture explains it all

Answer:
Choice D
Explanation:
"The taiga lies between the tundra to the north and temperate forests to the south. Alaska, Canada, Scandinavia, and Siberia have taigas. In Russia, the world's largest taiga stretches about 5,800 kilometers (3,600 miles), from the Pacific Ocean to the Ural Mountains."
(https://www.nationalgeographic.org/encyclopedia/taiga/, 2011)