Around 5000 bce, scientists believe hunters crossed the bering sea on this a) iceberg b) land bridge c) hovercraft plz answer asap

well there was a land bridge so the answer is b

land bridge is what i found.

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.