Something that is located beneath the surface of the water is:

Tariffs raise prices on imports, while quotas set limits on imports.

Further Explanation:  

Government of every country intervene in international trade. The factors are both economic as well as non-economic. This intervention is called protection. The Government policy of protection helps the domestic industries against the foreign competition. There are various other methods of protection aimed at raising exports and reducing imports. The Tariff is a tax on imported goods.

It is generally imposed by the government on the imports of a commodity, whereas quota is a quantity limit. It has powers to restrict the imports of the commodities physically. It defines the maximum amount which can be imported in a period. Tariff increases the GDP of the country whereas Quotas does not affect the GDP. Tariffs result in fall in the consumer's surplus and an increase in producer’s surplus. Quota results in decrease of consumer surplus.  

The income generated through tariff is used by the government. The income generated by quotas is used for import. There are two types of tariffs: Ad valorem Tariff and Specific Tariff. Ad valorem tariff is calculated on the value of imported products. A Specific tariff is a specific amount that is charged upon the type of goods.

Quotas are the upper limit that is put by the federal government on the goods and services imported and exported from or to other countries in any given period. It helps in measuring the regulation of trading amount between the countries. Quotas do not contribute and generate revenues but increase the production of goods.

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Answer Details:

Grade: High School

Subject: Political Science

Keywords: International trade, raising exports, reducing imports, quantity limit, increases, GDP, consumer surplus.

Concentric zone model theory suggested that cities grow in a circular fashion.

Answer: Option D

Explanation:

First model that explained the inner structure of social setting in urban area arranged in a circular or series of rings is the concentric zone model. This model essentially proposes that the growth of the city starts from the centre and slowly it starts growing outwards in series of concentric circles or rings.  

This model has been criticised on the ground that it doesn’t apply universally rather it is more restricted to the cities in U.S. Even the new cities which are growing currently are not growing in accordance with this model.

Answer:

Sector model theory suggested that cities grow in a circular fashion

Thus Option D is the right answer.

Explanation:

Concentric Circle growth model is first envisaged by Ernest Burgess who specifies that urban settlements of Chicago are based on this pattern. It starts with the central commercial region in the mid of the city.

Workers and employees who can afford their own transportation and rent are settled around the business hub. The second zone consists of offices and factories, industrial warehouses and transportation hub.

Third zone comprises of the typical residential houses. Mostly working class resides in this third zone. Fourth zone is also another residential area for elite and white collar job holders.  

Answer:

32,000

Explanation: