What common thread do these 3 excerpts from section VIII's three voices have?

Tribal Voice: When the giant began to set fires around, the twins repeated the word thain-mom over and over to themselves, and the smoke remained above their eyes.

Historical Voice: A word has power in and of itself. It comes from nothing into sound and meaning; it gives origin to all things.

Personal Memory Voice: When Aho saw or heard or thought of something bad, she said the word zei-dl-bei, frightful. It was the one word with which she confronted eveil and the incomprehensible.

A. The origin of the Kiowa people

B. How to approach fear

C. How to speak the Kiowa language

D. The power of language

All the excerpts presented to support the idea language is powerful as in them an evil force or difficult situation is confront this through the use of words. For example, in the first excerpt twins repeat a word over and over to stop a giant from burning them with fire; the second excerpt explains a word has a great power and gives origin to every; finally, in the third excerpt it is said some character repeated a word every time bad thoughts emerged in her mind. Thus, all have in common the power of language in terms of narrative thread or storyline.