Ocean trenches are steep depressions in the deepest parts of the ocean [where old ocean crust from one tectonic plate is pushed beneath another plate, raising mountains, causing earthquakes, and forming volcanoes on the seafloor and on land. With depths exceeding 6,000 meters (nearly 20,000 feet), trenches make up the world’s "hadal zone," named for Hades, the Greek god of the underworld, and account for the deepest 45 percent of the global ocean. The deepest parts of a trench, however, represent only about 1 percent or less of its total area. The vast submarine slopes and steep walls of trenches make up much of the hadal zone, where unique habitats extending across a range of depths are home to diverse number of species, many of which are new or still unknown to science.
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Answer:
B. TRENCH
Explanation:
Ocean trenches are steep depressions in the deepest parts of the ocean [where old ocean crust from one tectonic plate is pushed beneath another plate, raising mountains, causing earthquakes, and forming volcanoes on the seafloor and on land. With depths exceeding 6,000 meters (nearly 20,000 feet), trenches make up the world’s "hadal zone," named for Hades, the Greek god of the underworld, and account for the deepest 45 percent of the global ocean. The deepest parts of a trench, however, represent only about 1 percent or less of its total area. The vast submarine slopes and steep walls of trenches make up much of the hadal zone, where unique habitats extending across a range of depths are home to diverse number of species, many of which are new or still unknown to science.
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Answer:
TRENCH
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