The correct answer is: "Perfectly competitive market".
A purely competitive or perfect competition market is characterized by the participation of a large number of both sellers and buyers. In such a situation, each producer receives a very small share of the total market, therefore it lacks the power to influence on its conditions. Individual producers have zero influence on prices, this is why they are denominated price-takers.
Consumers are the ones who set the prices through their actions within the markets, that in turn determine the intersection of demand and total supply. They will able to acquire the products they are demanding at better market prices.
The volcanic islands of Oceania are the peaks of dormant or active underwater volcanoes. Among them there are islands of the area from ten square kilometers to several thousand and they are the main type of islands of Oceania.
The most famous of the volcanic islands are the Hawaiian Islands, Easter Island, Tahiti and Samoa. Coral Islands of Oceania (Biogenic) in the oceanic shallow water usually settled entire colonies of small marine animals-corals. For centuries, with the death of corals, their skeletons are the bottom of the ocean, pressed and form a mountain breed. Over time, coral reefs and whole islands appear above the surface of the water, and if the coral deposits occurred on the contour of the vent of the underwater volcano, there are atolls-coral islands with a lagoon in the center.
The Coral Islands (atolls) in Oceania are hundreds, both single and forming whole archipelalloes. These are the Carolinskie, Mariana, Marshall Islands and Gilbert and Tuammotu islands. The largest atoll of Oceania is Quadjalane. Its area is 2.3 thousand square kilometers (including the lagoon area) and belongs to the archipelago of the Marshall Islands.
Untied States, Britian, Italy, and France