They highlight the disruption of the natural order caused by Macbeth's crime.
When Macbeth killed King Dunken who was the most virtuous king, the whole world lamented for his uncertain death. Everything in the kingdom got disrupted and even the animals and nature seemed to behave in a much different way as they used to. The killing of an owl by a falcon which is a much smaller bird than the eagle symbolizes the murder of King Dunken by Macbeth. The eating of the horse by another horse gives a symbolic meaning about Macbeth’s plan to kill Banquo, who were great friends.
A definition would be common in a piece of expository writing, but it would not have much effect if you were trying to make an argument to a reader.
<em> B) definitions</em>
The flowers were so yellow I was nearly blinded.
Hyperbole: an exaggeration
I think it’s the third one