Step 1 : Introduction to the question " What is the world's deepest oceanic trench?"
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Some of Earth's most impressive topological features are hidden under the sea, including mountains higher and valleys deeper than any that exist on land. Located in the western Pacific Ocean, The Mariana Trench is the deepest of all ocean trenches. The deepest part, known as the Challenger Deep, is 35,797 feet below sea level. Hollywood director James Cameron made a solo descent to the bottom of the trench in 2012, but he wasn't the first person to visit. Only four descents have ever been achieved.
