Which event causes the formation of trenches in Earth's crust?

magma rising

mantle emerging

volcanoes erupting

lithosphere colliding

Lithosphere colliding

Step-by-step explanation:

Trenches are formed by subduction or lithospheric collisions, a geophysical process in which two or more of Earth's tectonic plates converge and the older, denser plate is pushed beneath the lighter plate and deep into the mantle, causing the seafloor and outermost crust (the lithosphere) to bend and form a steep, V-shaped depression.

Mantle emerging or plate tectonics shifting