There are many dangerous perils on the quest to destroy the ring of power, not only in the form of evil wizards and orcs and dark lords, but also in the form of real-world conditions like dehydration and hypothermia, which only makes it all the more remarkable that Frodo and Sam managed to get all the way to Mordor without being detected by the enemy, but also without succumbing to the other terrible and painful deaths that could have awaited them.
This in part thanks to the generosity and kindness of friends who helped them along their journey, like the elves of Lothlorien who gave them the Lembas bread that helped them survive many hungry nights, and people like Faramir who gave them a good meal and a package of food and water to take with them when he released them from Ithilien. But the other part relied on keen survival instincts, and at least a little bit of knowledge of how to survive without the comforts and seeming necessities of home.
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There are many characters who are very good at this, including Gandalf the wizard who was always able to use his magic to create a fire for light and warmth, and Aragorn who, as a ranger, had spent many nights out in the wild, learning the lay of the land. Once Frodo and Sam depart from the other members of the fellowship though, they must rely only on each other, and to a certain extent Gollum, to help them survive all the hazards that lie ahead. It becomes very quickly obvious that among all of the hobbits who set out from The Shire, Samwise Gamgee is the most equipped to help them endure the terrible conditions that they must face, because he possesses surprisingly good survival skills for someone who has never ventured
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