Answer:
The repetition of the word "voice" and the line "The voice that beautifies the land".
Step-by-step explanation:
The poem "Twelfth Song of Thunder" is a Navajo song or chant that praises the creations of god, nature, the land, the animals and the sky. It is also sung as a part of the traditional Navajo Mountain Chant Ceremony.
The repetition of the word "voice" in the poem as well as "the voice that beautifies the land" shows a great deal of respect and appreciation for the creations found in nature. They also give a indication of the idea that this song is a chant to god.