GEOLOGY

Detailed explanation-1: -In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.

Detailed explanation-2: -Deep ocean trenches and volcanic arcs are created by convergent boundaries of ocean and continental crust. The varieties of lithosphere that collide into each other as two plates move into convergence, determines what happens during collision.

Detailed explanation-3: -At a convergent boundary between two plates of oceanic lithosphere, the older, denser oceanic plate will always subduct, which will cause earthquakes and form volcanic isles. An oceanic-oceanic convergent boundary describes a collision between two plates composed of oceanic lithosphere.

Detailed explanation-4: -Trenches are formed at subduction zones on a convergent plate boundary.

Detailed explanation-5: -When oceanic crust collides with a continent, an oceanic-continental convergent boundary forms. The oceanic plate is denser, so it undergoes subduction. This means that the oceanic plate sinks beneath the continent, forming a deep ocean trench.