The last answer option presents a detail that supports the central idea of the oral tradition in the maintenance of the Kiowa culture. This detail states that:
"Yet it is within the reach of memory still...and ..."
We can arrive at this answer because:
For this, cultural concepts must be kept in the memory of older generations so that they are passed on continuously and keep tradition and customs always alive and active.
More information on oral tradition at the link:
https://brainly.com/question/1672106