What is the approximate depth in feet of the world's deepest ocean trench?

The approximate depth of the world's deepest ocean trench, the Mariana Trench, is around 35,840 feet (approximately 10,994 meters). This depth makes the Mariana Trench the deepest part of the world's oceans, significantly deeper than any other natural feature on Earth. The trench reaches its maximum known point, known as Challenger Deep, which is where this measurement is taken from.

The other choices represent depths that are less than the verified depth of the Mariana Trench. While depths such as 32,800 feet or 25,840 feet are substantial and may pertain to notable oceanic features or less profound trenches, they do not reach the extremity that characterizes the depth of the Mariana Trench. Therefore, the choice that states 35,840 feet is recognized as the closest approximation to the actual depth of the world's deepest ocean trench.