Answer:
Lady Macbeth speaks to her husband agit with subtlety, like "an innocent flower concealing the deadly serpent underneath".
The snake is the appropriate comparison because it refers to "betrayal", which is exactly what Macbeth will do to Duncan.
Both Lady Macbeth and Macbeth are similar to the snake.
Step-by-step explanation:
As you may already know, Macbeth received the prophecy that he would become king, and moved by envy and thirst for power, assassinates King Duncan and usurps his throne.
His wife, Lady Macbeth is the architect of the entire murder plan and asks Macbeth for the moment as "an innocent flower concealing the deadly serpent underneath". That's because Duncan and Macbeth are close friends and Duncan trusts him. In this case, the "serpent" mentioned, represents the betrayal of a friend.
Both Macbeth and his wife can be compared to a snake. Macbeth can be compared to a snake because of his betrayal, where he killed the king and friend with his own hands. Lady Macbth can be compared to a snake because of its dangerousness and subtlety in acting badly.