I would say the following:
1) access to food and water. This means that they should be next to water sources (rivers) and fertile ground
2) construction material: wood and/or stones
I would say that a location on a trade route would also be beneficial (and rivers were trade routes: this explains why so many cities were on rivers!)
Answer:
producer; concentrated
Explanation:
Tariff and quotas are trade barriers that governments establish to protect national products. Tariffs are taxes imposed on imports and quotas are a limit on the quantity of a product that can be imported. These barriers are established when the government is willing to protect national producers when they are not able to compete with the low prices on the imported products. Also, the benefits of these restrictions are concentrated on the producers but its disadvantages affect all the consumers who have to buy products at a higher price. According to this, the answer is that tariffs and quotas are often imposed when a government is more responsive to producer interests, and the benefits of those trade restrictions are often concentrated.
scientific polls
scientific polls are the best way
Answer: becoming a disciple of Christ