In this excerpt from Hark, hark! the lark at heaven's gate sings (in Cymbeline, King of Britain) by William Shakespeare, we can observe the presence of allusion when the speaker mentions Phoebus. Take into consideration that an allusion is a reference made by the author to something they know their audience understands as valid by some standard. Because he's casually dropping Phoebus's name around, knowing that his audience will know what it means, this is a good example of allusion.
On the other hand, you can also observe alliteration when there are more than one word repeating the first consonant sound (hark... heavens) used to create a rhythmic pattern.
Therefore, your best answer is alliteration and allusion.
