Some psychologists believe that an organism's behavior is motivated by the need to achieve a state of balance in which the body functions effectively-a state called

i am confused, what is the question? i can you out if you put it into more depth.

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.