At a converging plate boundary, tectonic plates move toward each other. Let's analyze the options provided:
A) Southwest Indian Ridge: This is a diverging plate boundary where tectonic plates move away from each other. So, it's not located at a converging plate boundary.
B) Iceland Hotspot: This is associated with a mantle plume, not a plate boundary, so it's not at a converging plate boundary.
C) Marianas Trench: This is located at a converging plate boundary where the Pacific Plate is subducting beneath the Philippine Plate. This is the correct answer as it matches the description of a converging plate boundary.
D) Sandwich Plate: This is not a recognized geological feature or plate boundary, so it is not located at a converging plate boundary.
Therefore, the correct answer is C) Marianas Trench, as it is located at a converging plate boundary where subduction is occurring.
