15. Hierapolis became an important
center in the Roman Empire?

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.

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explanation:

answer; /// decreasing responsiveness to a stimulus to which one is repeatedly exposed;

answer; francis cecil sumner;