What is the technology like in the midwest

Why are slanted roofs found on many buildings within russia and finland? a. to prevent ice slides. b. to prevent the build-up of water during heavy rains. c. to prevent heat from escaping during the clod winter months. d. to prevent snow build-up.

Which directions did the mongols travel as they swept across asia and europe

What were four significant consequences of the 1911 revoultion