The Mongols set up a tribute empire called The Golden Horde. Serfdom arose as peasants gave up their lands to the aristocracy in exchange for protection from the Mongols. Moscow benefited financially by acting as a tribute collector for the Mongols. Mongol rule kept Russia culturally isolated from Western European trends such as the Renaissance.
<span>The coriolis effect does this. This is a inertial force that acts on objects that are in motion relative to a rotating reference frame. This means that when the earth rotates, objects in the north hemisphere is deflected to the right, while objects in the southern hemisphere are deflected to the left. This makes the winds shift left or right.</span>
C, because it is bounded to the west by the Black Sea
