1, Here is the link of the bedform phase diagrams information, it is the pictures from the textbook you need to read: https://www.jianguoyun.com/p/Daf_IOkQj7rnBRiy6RM 2, Just talk about what is the bedform phase diagrams, how is your own understanding about bedform phase diagrams. 3, Just provide any materials that you can find, and the materials can prove the WRITING that what is the bedform phase diagrams. 4,This class is sedimentology