Question

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answer 4th one​

Answer 1

Answer:

These chasms are the deepest parts of the ocean—and some of the deepest natural spots on Earth. Ocean trenches are found in every ocean basin on the planet, although the deepest ocean trenches ring the Pacific as part of the so-called “Ring of Fire” that also includes active volcanoes and earthquake zones.

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Answer 2

Answer:

Trenches are found in ocean basins. They are important as they define the earths natural boundaries