Why did odysseus plug the mens' ears with wax when the ship approached scylla and charybdis?

to prevent them from hearing him share his secret plan to defeat scylla
to protect them from the deadly song of the sirens
to protect their ears from the poisonous gas released by charybid
to prevent them from hearing the secret prophecy delivered by the sirens

terrestrial level - terrene position

potentially - possible/likely

dangerous tasks - treacherous assignment

specifically - exactly/precisely

disabilities - impairment/ailment

to boost - push/lift/raise

artificial intelligence - robot/ ai/machine

enemies - terrorist/opponent/competitor

scientific endeavors - experimental intent

valuable - expensive/priceless

result - outcome/product

hope this !

~just a girl in love with shawn mendes