First to answer gets brainlieet

1: Yellow Sea, 2:River Valley

Explanation:

Hope this helped:)

Sorry if it is wrong.

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.

states grant a variety of local governments power to meet residents’ needs (source: apex learning). hope this !