Answer:
In the book he proves that he is Odysseus by knowin that their bed is unmoveable ( one of the bed posts is made from a tree that is still rooted in the ground). In the movie Athena turns Odysseus into an old beggar when he returns to Ithica. On the other hand, in the book Odysseus disguises himself as on old beggar.In the original tale of The Odyssey, through the poem, Poseidon is indignant when regarding Odysseus as he had blinded his son, a cyclops named Polyphemus. However in the film conversion of The Odyssey, the god Poseidon aids Odysseus in convincing the Trojans to take the offering (a wooden horse filled with Greek soldiers) into their walls of Troy. He does so by ordering his sea monster to devour Laocoön, who told the Trojans to burn the horse; and when Laocoön dies the Trojans consider the horse as a sacred offering and allow it into their walls.
Step-by-step explanation:
Hope this helps :D