Ocean trenches are most often formed when

Ocean trenches are driven by tectonics and are most commonly found along the Pacific Ocean in a zone known as the ring of fire. They are usually formed at the boundaries of convergent plates, at a region where a continental plate submerges beneath an oceanic plate.

Explanation:

answer; i believe the correct answer is (sporophyte);

and after water is usually warmed by the sun the water temperature raises and then evaporates .