Final answer:
Hobbits are central to the narrative of The Lord of the Rings due to their humility and unlikeliness as heroes, representing the theme that greatness can arise from the most modest of origins.
Step-by-step explanation:
The significance of Frodo and his Hobbit companions in The Lord of the Rings is rooted in the themes of humility and the unexpected hero. Hobbits, by their nature, are less imposing than the grander races of Middle-earth like Elves and Men. They are small, unassuming, and typically overlooked, which makes them the ideal bearers of the One Ring precisely because they are less likely to be suspected of carrying such a powerful artifact. Their ordinary appearance and simple lifestyle underscore the narrative that the most extraordinary acts can come from the most ordinary individuals.
This theme is integral to the story's moral fabric, demonstrating that the smallest creatures can have the greatest impact. The Hobbits' homely virtues of resilience, courage, and loyalty become amplified in contrast to the grandeur and sometimes hubris of the more powerful races. Their role as Ring-bearers is also significant in that it aligns with the recurring motif in literature of the 'underdog' triumphing despite overwhelming odds. Thus, their presence as central characters emphasizes the universal message that greatness is not exclusive to the traditionally powerful or mighty.