How do the Lilliputians keep Gulliver captive in his new home?

The Lilliputians keep Gulliver captive primarily by placing chains around his foot. This method effectively limits his movement and restricts him from escaping, as their tiny size means they cannot overpower him physically. The chains serve as both a physical means of confinement and a symbolic representation of their control over a vastly larger being.

The other options depict methods that are not utilized in the text. A cage or a wall would not be practical given Gulliver's giant size, and a blindfold would not effectively contain him or prevent his potential escape. Instead, using chains highlights the theme of dominance and power imbalance between the Lilliputians and Gulliver, emphasizing their cleverness in managing their predicament. This method of restraint reflects the various ways individuals or societies exert control over one another, a recurring theme throughout the narrative.