Which aspect of the excerpt from the way to rainy mountain best exemplifies how american indian culture and themes can be passed down and changed over time?

If your choices are the following:
Momaday seeing his grandmother standing at the wood stove on a winter morning and turning meat on a skillet. 

Momaday watching and evaluating his grandmother praying in the traditional Kiowa manner

the slaughter and loss of the buffalo on the American plains

Momaday admiring his grandmother sitting at the south window, bent above her beadwork

So the answer would be Momaday watching and evaluating his grandmother praying in the traditional Kiowa manner.