An elected leader in a parliamentary democracy is called
a. monarch regent caliph prime minister

answer; eliminate parking problems in cities, because a car took up only half as much space as a horse and buggy;

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.