Which group is characterized by low heels and a rebellious attitude?

The group characterized by low heels and a rebellious attitude in "Gulliver's Travels" are the Whigs. In the context of the novel, the Whigs represent a faction that opposes the established authority, particularly in contrast to the Tories, who often align with the monarchy and traditional practices.

The symbolism of low heels is particularly relevant, as it reflects their stance for reform and a more egalitarian society, differing from the Tories, who typically favored the status quo and the established social hierarchy. This detail of low heels serves as a visual cue that aligns with their progressive ideals.

The other groups mentioned do not share this specific characterization. The Tories, for example, would embrace higher heels symbolizing their allegiance to aristocracy. The Tramecksan and Slamecksan groups, while identified in the context of Lilliput, do not align with the broader political allegory derived from the Whigs' rebellious spirit. Thus, the correct answer is rooted in the themes of political satire and character representation found in Gulliver's Travels.