Hello. You have not shown the text to which this question refers, which makes it impossible for it to be answered. However, I will try to help you as best I can.
To answer this question, you will need to read the text and identify a behavior, custom, tradition, activity, or belief that the Sioux held and that is not known to the general public. This element is the textual element capable of teaching the reader something about these people and how they lived.
