Final answer:
The example described in the question is an example of asynchronous sound.
Step-by-step explanation:
The example described in the question is an example of asynchronous sound. Asynchronous sound refers to a situation where the sound does not match or correspond to the visual image that accompanies it. In this case, the sad image of the child crying is juxtaposed with a joyful or upbeat musical score, creating a contrasting effect that can convey a deeper emotional message.
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