Choose the submarine Correct.  now choose the shape with tirangle on Incorrect, delete your choice.  Choose the anvil on top of triangle
page5-140.png page7-166.png page6-52.png page3-123.png
page5-28.png page5-175.png page3-123.png page5-140.png page2-173.png page7-166.png page6-52.png page2-155.png page3-35.png page7-80.png
page3-35.png page5-140.png
Correct.  now choose the large angled rock