Answer:
The warning that the first apparition gives Macbeth is that He must watch out for Macduff
Explanation:
In the play of "Macbeth" by William Shakespeare, when the three apparitions come, they have different messages for him, the first one appears as an armed head floating in the air this is warning him about Macduff, with the lines "Macbeth! Macbeth! Macbeth! Beware Macduff. Beware the thane of Fife.", this gave Macbeth the intention to kill him.
