Understanding the motivation a person has to do something because it is inherently interesting to them is characterized by which theory?

Which groups of people most directly benefited from song innovations in the song dynasty‘s open border policy?

Dr. robbins wants to know if there are different opinions regarding the value of public school education between native americans who have at least one relative who attended indian boarding school and native americans who have no family experience with indian boarding school. dr. robbins contacts 35 native american participants in each group. he wants each group to include younger as well as older adults, and a mix of male and female participants. he asks each person to complete a survey about their attitudes toward public education. the design of this study is:

Which three sentences in the story indicate that that the passage is an ex nihilo type of creation story?