Answer:
1
Explanation:
The rest are wrong b/c it helped <em>expand</em> China rather than isolate it, they didn't use ships on the Silk Road, and it brought better communications, etc. between countries. 
 
        
             
        
        
        
Answer: The answer would be B.
Explanation: Lines of longitude are imaginary lines in Geography that run vertically (up and down). Since these lines are travelling from North to South, the answer must be B.
 
        
                    
             
        
        
        
Answer:
Boreal forest
Explanation:
The boreal forest is a biome that is found in the Northern Hemisphere. It is located between the temperate forests and the tundra. These forests are dominated by coniferous trees. The climate is continental, with the winters being very cold and snowy, while the summers are pleasant with mild temperatures. The animals that live in these forests are the elk, moose, deer, wolverines, wolves, black bears, mink, foxes, lynx, among others. All these animals have special adaptations that enable them to live in this biome. They all have thick fur for most of the year, only shedding slightly during the summer.Their paws tend to winder and have goo isolation so that they can walk easily on the snow and avoid frostbite. It is not a biome that has very big diversity in flora and fauna, but it is not a one that lacks in it as well.