What two major threats does Reldresal inform Gulliver about?

Reldresal informs Gulliver about two significant threats that the Brobdingnagians face: a violent faction within their own ranks and an impending invasion from external forces. This context highlights the internal and external challenges that the Brobdingnagian society must navigate in order to maintain stability and security.

Understanding the implications of these threats sheds light on the social and political tensions present in the narrative. The internal faction represents the struggle for power and control, showcasing the complexities within their governance. The external threat of invasion illustrates the vulnerability of the society to outside forces, which echoes broader themes in Swift's work regarding human nature and societal conflicts.

In contrast, the other choices do not accurately reflect the specific details presented in the story. They introduce scenarios that, while potentially relevant in other contexts, diverge from the actual threats discussed by Reldresal. This focus on a violent faction and foreign invasion allows for a deeper exploration of the story's political commentary and the consequences of such threats on society as a whole.