Answer 1.In Homer's the Odyssey, Argos is Odysseus' faithful dog. After twenty years struggling to get home to Ithaca, Odysseus finally arrives on his homeland. In his absence, reckless suitors have taken over his house in hopes of marrying his wife Penelope.
2.Unlike everyone else, including Eumaios, a lifelong friend, Argos recognizes Odysseus at once and he has just enough strength to drop his ears and wag his tail but cannot get up to greet his master. ... The simplicity of the relationship between Argos and Odysseus allows their reunion to be immediate and sincere.
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It means that one should never lose hope because nothing is ever completely dark, there is always something good to which we can cling.
The part of a letter it is asking for, is what's called the Signature Line. The Signature Line in a letter is where the author of the letter will tell the reader they wrote it.