The ability to simultaneously process the pitch, loudness, melody, and meaning of a song best illustrates "parallel processing."
This is because parallel processing is a term that describes the activities performed by individuals in such a way the individuals perform various activities together or simultaneously.
In other words, Parallel processing involves working or performing different actions simultaneously, usually on a single system or computer.
Thus, in this case, when an individual is simultaneously processing the pitch, loudness, melody, and meaning of a song, this means parallel processing.
Hence, in this case, it is concluded that the correct answer is "parallel processing."
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