U have to give us the passage also so I don’t think anyone can help unless they’ve done it before
These two characters are not similar whatsoever. Eurymachus is a deceitful person, always scheming, thinking of plans how to enjoy himself and doesn't care about others. He even wanted to kill Odysseus' son Telemachus. He treats everyone with disrespect and is extremely arrogant. These are not adjectives that describe Odysseus, even though he did show arrogance when defeating the Cyclops.
Answer:
To inform the reader about some basic facts regarding the planet Mars
