I believe the answer is environment.
I don't know if there were any options, but something that is at heart of a democracy is popular sovereignty: the belief that the power is in the hands of the people.
In a representative democracy those people are represented by some people chosen, to make the democracy easier to work.
alternatively you could say a body of laws: legislature or a constitution.
Answer:
The city was able to maintain decent amounts of food and water, and therefore was an important pit stop for trade caravans traveling along the Red Sea. This was especially important given the merchant culture of Arabia. Along with the port of Jidda, Medina and Mecca thrived through years of pilgrimage.
:
Vertical zonation is basically like the main pattern of littoral assemblages on rocky shores. at a regional scale.