Exercise 9 - Part 1
For questions 1-8, think of the best word to complete each sentence.
Deep on the ocean floor, where solar energy cannot penetrate, giant fields of hydrothermal vents spew toxic chemicals into the freezing water. For decades, the existence of complex life in these extreme environments (1) botheredinterruptedbaffledshaken marine biologists. However, exploration using robotic submersibles has (2) shedpoureddroppedthrown new light on how these organisms thrive. (3) OppositeContraryConflictingContradictory to popular belief, these deep plains are home to unique species that exist nowhere else on Earth. This extreme habitat (4) ensuressecuresfulfilsprovides them with a steady supply of minerals. Discovering these ecosystems has given oceanographers vital (5) perceptionawarenessvisioninsight into the origins of life. Nevertheless, conservationists are under no (6) errordoubtillusionimpression about the dangers that commercial deep-sea mining poses. International bodies must (7) maketakedoget immediate steps to establish strict protective regulations. Failing to act could cause irreversible ecological damage to (8) spreadexpandwidenprolong across vast areas of the global ocean.
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