This sentence contains an example of what literary technique? she delighted the king with her voice, which was as melodious as the song of a nightingale.

The sentence contains an example of a simile.

Explanation:

A simile if a figure of speech that makes a comparison, showing similarities between two different things. It is a direct comparison because it makes use of the words "as" or "like".

A nightingale is a bird which is notorious because of its beautiful, loud song. The simile compares the lady's voice with the singing of the bird.

roses are red,

violets are black,

for what you said,

i hope you sit on a big fat tack.