What two innovations allowed Temujin (Chinggis, or Genghis Khan) to unite the Mongol Confederation and earn the title of Great Khan?

Explanation:

Genghis Khan was one of the greatest conquerors to ever exist and under him, the Mongols became a fearsome empire that brought terror to Asia and Europe but at the same time facilitated trade and security.

Genghis was able to unite the different Mongol tribes in two ways: first he promoted people based on merit instead of family ties and rank and this led to a more efficient running of the empire.

Second, when he conquered clans, he would remove their leaders and take in the lower classes into his clan thereby making them feel loved and earning him their loyalty.

b europeans take corn to africa. corn becomes an important crop there.