Macduff's son is a character that even though, his age is not stated in the play, is assumed to be young. The killing of this young character and especially the way that happened shows Macbeth's kingdom cruelty. The murderers call this boy "Egg" while he tried to defend himself and defend his mother who was later killed too.
Answer:
The inference that can be drawn from these lines of Feste's song in Shakespeare's Twelfth Night is that they are making reference to life's unpredictability and; therefore, they urge people to enjoy their youth.
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Explanation:
