Trench

A trench is a long, narrow depression in the Earth's surface, typically formed by natural processes like erosion or by human activities such as construction and excavation. Geologically, trenches often occur along tectonic plate boundaries where one plate sinks beneath another, creating deep, elongated valleys known as oceanic trenches. These trenches can be several kilometers deep and are significant in studying Earth's geology and plate movements. In construction, trenches serve as pathways for utilities like water, gas, or electrical lines, providing a controlled way to lay or repair infrastructure underground.