This is because the sound you make when you say x is ex thus using a but when you make the b sound it sounds like be.
Answer:
That the sirens would kill you
Explanation:
Circe warns Odysseus to avoid the song of the sirens because it will seduce him. What is the danger associated with the sirens? The sweet sound of the sirens' voices will lure Odysseus and his men in by singing of what they desire and kill them.
I think the answer might be the deer
.