We can reject answers C) and D) :those are two famous cities in Russia, and cities would be too small to take up three-forths of Russia, the biggest country in the world.
Murmansk is also a city: in the North-West of Russia, in the Arctic Circle.
So the correct answer is: Siberia
A would be your answer. Hot spot.
Answer:
Its when unnatural things, turn natural things irregularly hot or cold.
Dividing islands north and South Korea
