With the quiet melting of sea ice, it is becoming easier and easier to enter the Arctic Ocean. Arctic resources that were not economically exploitable have also emerged as "ice surfaces. " The Arctic is known as the "Second Middle East. " Resources are also oil and natural gas.57 million years ago, the Arctic Ocean had a warm climate and lush biodiversity. Scientists drilled and sampled on the ridges of the Arctic Ocean bottom, and found thick organics of ferns and plankton in the sediment. Layer, found a large number of plankton and other organic matter in the carbon-rich black core. This carbon-rich sediment is the prerequisite for the formation of oil. Sure enough, since the 1960s, people have successively been on the Arctic Ocean shelf. Abundant oil and gas are found in the marginal sea. The most appropriate summary of this text is:. ['Oil and gas are the richest natural resources in the Arctic.', 'Global greenhouse effect accelerates the development of Arctic.', 'The conclusion that the Arctic is rich in rich natural resources has been confirmed.', 'The Arctic is becoming the "second Middle East" that nations are rushing to develop.']