According to the u. s. constitution, what does the executive branch of the government do?
a. it makes the laws.
b. it reviews the laws.
c. it interprets the laws.
d. it carries out the laws.

answer; the correct answer is (ethics);

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.

i believe your answer is mountains.