Mysterious Underwater World

Using Alice 2.4.3 create a mysterious underwater world. Use the sand template. Change the World Properties so that the atmosphereColor is blue, the ambientColor is black, the ambientLightBrightness is 0.1, and the fogDensity is 0.03. Add at least four of the following objects: seaweed (Ocean), FireCoral (Ocean), Mt. Fuji (Japan), island2 (Environments), Sailboat (Vehicles), BigBoat (Vehicles), Boeing707 (Vehicles). Be creative by adding objects that would make the world mysterious.

This question is straight out of a textbook.