What are four changes
the Mongol invasion brought to Russia?
in

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.

A,) cause a & b are equal & both gives 180°

Answerair masses develop near the equator are warm; tropical air mass