I have noticed that in creation myths often things which are important to human survival are included and are perhaps of same main focus. For example in the case of Mayans and the Popol Vuh, after several unsuccessful attempts, the gods finally make human beings from corn. In one prior attempt, the gods tried to make humans from earth and mud, and in another from wood. Both of these attempts were unsuccessful for various reasons.
I find it interesting that earth and wood were not seen as suitable creation materials for humans in the Mayan myth, while in other mythologies it was. I think the idea that corn being the material from which humans were successfully created is an indication of how important it was in the lives of Mayans. Corn was a primary food source for them, which of course made of high concern. I think that it can be said in general that the mythologies of certain cultures reflect not only the important moral and conceptual values of their culture, but also what resources or other material goods were most important in their lives.