Water erosion is the main cause which is the loss of topsoil due to water.
The tilt of the earth is what influences the seasons. Not the distance. The distance stays the same all the time because of gravity.
Hope this helps
Answer:
1/8 is already simplified which is .125.
3/16 simplified is also simplified which is .1875
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