Which type of landform is shown in the photo above

Plzzzzzz me someone this is my last chance on this test i cant fail again

What did the pattern of earthquakes in the wadati-benioff seafloor zones show scientists? a.) earthquakes occur where the ocean floor reaches its highest temperatures. b.) many earthquakes take place 700 kilometers below the seafloor. c.) slabs of ocean floor return to the mantle in subduction zones. d.) ocean - trenches cause earthquakes.

Which of the following is the main purpose of using an anchored network of booms which funnel debris to a collection area?