What structures form due to the melting of subducting plates?

Question

What structures form from the melting of subducting plates? Plutons, Accretionary wedges, Deep sea trenches, Faults?

Answer 1

The key is breaking down the question to: what structures form from melted rock?

Faults: No,

Accretionary Wedges: No,

Deep sea trenches: No,

Plutons: Yes.