The lowest place on Earth with exposed crust is the Challenger Deep, located in the Mariana Trench in the western Pacific Ocean.

Here's why:

* Depth: Challenger Deep is about 10,902 to 10,929 meters (35,768 to 35,856 feet) below sea level.

* Trench Formation: Trenches are formed by the subduction of tectonic plates, where one plate slides beneath another. The Mariana Trench is a result of the Pacific Plate subducting beneath the Philippine Plate.

* Crustal Exposure: At these depths, the pressure of the overlying water is immense, and the crust is exposed to the ocean floor.

It's important to note that the exact depth of Challenger Deep can vary slightly due to measurement techniques and fluctuations in ocean currents.