Which excerpt from the odyssey best shows that the ancient greeks greatly valued the idea of home?

As noted by the other respondent, this quotation from The Odyssey demonstrates the value the Greeks placed on the idea of home:
"I drove them, all three wailing, to the ships, tied them down under their rowing benches, and called the rest: ‘All hands aboard; come, clear the beach and no one taste the Lotus, or you lose your hope of home.’"

Some context:
The overall story arc of Homer's epic poem, The Odyssey, is one of going home.  The whole ten-year journey of Odysseus is ultimately aimed at getting home again to his wife and son.  Odysseus must endure many trials and difficulties in order to get home.  Meanwhile, back at home, his wife, Penelope, has her own challenges to face in keeping home intact for them and their relationship.  She must show her endurance and perseverance in the face of suitors who have other designs on her and her household.

The exchange of foods between the new and old worlds