Answer:
Litosphere coliding
Explanation:
Trenches are formed by subduction, 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.
In subduction process, the trench is formed by colliding lithosphere. Thus, option D is correct.
Trenches are the long depression in the ground deeper with a width which is significantly smaller than its length.
It is formed by a geophysical process called subduction where more than one tectonic plate converge and the denser plate is pushed behind the lighter plate into the mantle.
It is either formed naturally or artificially for various purpose.
Human construct trenches for fortification of warfare, investigation at some archaeological sites, for agriculture and also make fencing and dividing lines between fields.
The most abundant trenches in nature are found the ocean, formed by the buckling, folding, and spreading of the sea floor.
It causes the bending of seafloor and outermost crust by forming a steep, V-shaped depressed structure.
As it involves the lithosphere to collide, option D is correct.
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