Friendships and alliances play a role in the outcome of the final battle in the hobbit because:
The final battle in the Hobbit shows how the Goblins ad the Wolves united to fight against the Elves, dwarves, and humans. In the end, Bilbo was knocked unconscious by a stone.
So, the main idea of this text is that people who have maintained relationships with themselves tend to unite when dealing with challenges.
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