What are taxes that are levied on imports and/or exports? tariffs capital free enterprise fines excesses

The answer is A Tariffs

which sentences ? that question is incomplete

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.