The correct answer is - C. from thawing the ground beneath them.
Tall buildings in Siberia have to be lifted from the ground because in most of Siberia the ground is not stable. The ground in this part of the world is under the influence of the permafrost for the biggest portion of the year, which makes the ground very rich with frozen water, but unlike the popular opinion that in Siberia the summers are cold too, they are actually not cold but pretty warm and temperatures can reach up to 30 C degrees. This warmth makes the ice and snow melt, thus making the ground very unstable and very rich with water, so any higher and heavier building will start sinking into it, and after that when the winter strikes again the lower part of the building will be trapped by the permafrost.
b)
Think of how rural area population increases, and since urban area is where there are allot of people, rural area also can become urban.
Sleet is snow that melts and refreezes before reaching the ground creating a somewhat snowy surface
Freezing rain is snow that melts and refreezes once it hits the ground creating and icy surface like black ice or something
Yes, mining is a type of land use
