Answer:
c. repetition
Explanation:
In "Just Just", the speaker uses the poetic element known as repetition.
Repetition is a figure of speech, widely used as a poetic resource to create a certain musicality and rhythm in the text. This is because it allows the repetition of the same word, the same group of words or the same syllable throughout the text.
It is also widely used in song lyrics and in literature in general.