According to this excerpt from book 24 of homers odyssey, why does eupithes want revenge against ulysses? because he is devoted to neptune because ulysses hides his true identity from him because ulysses killed his son antinous because he wants to marry penelope because ulysses killed all of penelope’s suitors

The answer is: Because Ulysses killed his son Antinous.

the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."