Which of the following ocean floor relief features represents a steep-sided, narrow, and deep depression found mostly adjacent to continental margins or island arcs?

💡 Solution & Explanation

Oceanic trenches are steep-sided, extremely deep depressions located predominantly along convergent plate boundaries near continental margins or island arcs, such as the Mariana Trench. Abyssal plains represent relatively flat regions of the deep ocean floor rather than narrow depressions. Ocean floor topography is a staple topic in geomorphology.