Answer:
They highlight the disruption of the natural order caused by Macbeth's crime.
Step-by-step explanation:
In Shakespeare's "Macbeth," the fact that an owl is killed by a falcon and that a horse eats another represents the disorder and chaos in the universe after King Duncan is killed by someone he trusts, Macbeth. The reason is that in Elizabethan times there existed the idea of royalty symbolizing the order of nature and the universe. As a result, the circumstances are a sign of something bad to come.