What are some reasons people moved to the west​

Which four of these developments were made under mongol rule during the pax mongolica? the extension of the grand canal in china the spread of christianity the spread of weapons that used gun powder the invention of new medicines the establishment of a postal system the invention of geometric models of lunar motion

The sahel is located on the edge of the sahara desert. a.north b.west c.south d.east

Prior to which amendment were slaves counted as three-fifths of a personality