"Détente" is the answer you're looking for.
Answer:
Option D Greek City States
Example: Athens
As I am thinking you mean "Producers" when you say "Sellers" I am going to go with, Yes. You are correct it is Supply.
(Also the other one is called Demand not price)
One reason for the development of amn early civilization in the Tigris-Euphrates river valley was that.<span>periodic flooding </span>left<span> rich soil, which was ideal for farming.</span><span> </span>
