What musical aspect of a corrido helps the singer recall its long,detailed texts?

Question

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Melody is the musical aspect of a corrido that helps the singer recall its long, detailed texts. The melody of a corrido is usually simple and repetitive, with a clear and memorable tune that makes it easier for the singer to remember and perform the entire narrative of the song. The melody may also include melodic devices such as repetition, variation, and ornamentation to create interest and variation within the text.

What Musical Aspect of a Corrido Helps the Singer Recall