Which is a shared responsibility between state governments and the federal government

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Explanation:

Making and enforcing laws are shared responsibilities between state governments and the federal government. Laws created by the state government are applicable only to its own state

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.