The method keeps the free/busy lists organized by memory locations, from low-order memory to high-order memory.

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.

where is the rest of the question. this isn't making sense. can you upload a picture of the question?

answer; belief perseverance;