Answer:
D. to ask for a gift, such as rain, from nature
Step-by-step explanation:
According to the observations that Washington Matthews made of Navajo songs, the reason that is most likely the purpose of “Twelfth Song of Thunder” is "to ask for a gift, such as rain, from nature"
From the excerpt of “Twelfth Song of Thunder”, it is seen that the author was asking for a "gift from nature like rain" which he terms the voice that beautifies the land and the voice of thunder.
He further reveals that the voice is among plants. This means a gift like rain from nature.