The correct option is: "Describing the wide variety of people who live in the valley shows many different kinds of people can relate to the Great Stone Face."
The author introduces the inhabitants of the valley before describing the Great Stone Face in order to establish that people from all walks of life respect and admire the Great Stone Face. By describing the diverse inhabitants of the valley, the author emphasizes that people from different backgrounds are all united in their reverence for the Great Stone Face. This highlights the universality of the legend and the way it transcends social boundaries. Therefore, it shows that many different kinds of people can relate to the Great Stone Face.