How are the sixth, seventh, and eighth amendments similar?

well, there are a lot of places we get information about earth from. like science classes, websites, books, newspapers, etc.

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.