Ocean Trench
Ocean trench explained in an easy to understand way:
Imagine trying to fit a thick blanket into a small, overstuffed closet, where you have to push it down into any available space. This is similar to how an ocean trench forms, where one tectonic plate is forced beneath another and bends downward into the Earth's mantle. Just like the blanket being pushed into a cramped space, the ocean trench represents the area where the subducting slab bends down, accommodating the pressure and constraints of the tectonic plates above and below.
Practice Version
Ocean Trench: A deep part of the seafloor where a subducting slab bends down. Ocean trench. An ocean trench is a deep underwater valley formed where one tectonic plate is pushed beneath another.