Final answer:
Lennox describes the previous night as unruly and chaotic, foreshadowing the events in Macbeth.
Step-by-step explanation:
Lennox describes the previous night as unruly and chaotic. He mentions that chimneys were blown down and strange screams of death were heard in the air. This description is significant as it sets a dark and ominous tone, foreshadowing the events that will unfold in the play Macbeth.