It would be A because textbooks aren't updated for years so he will likely never find it there
S waves can only move along the surface of the planet like ripples on water.
Answer:
Convergent
Explanation:
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.
