Which letter in this diagram represents precipitation? A B C D The Graphic illustrates the water cycle. In the northern part of the graphic is shows cloud formations. In the southern part of the graphic is shows the ocean and landforms extending out of the ocean. The letters A, B, C, and D are in red and mark parts of the graph. Letter A marks the area above the ocean water. The letter B marks the area directly under a raining cloud that is labeled cloud formation. The letter C is directly on a cloud labeled condensing water vapor. . Three arrows extend up and it says that the ocean contributes about eight percent of total water vapor in air. The letter D marks an impervious area of land. An arrow extending from surface runoff shows a cycle that moves downward and circular to the right to the three arrows pointing upward to the clouds and back downward. Another arrow shows lake water and rain moving downward.