Final answer:
The paragraph discusses the main conflict in 'The Twenty-One Balloons' by William Pene du Bois, contrasting the protagonist's perspective of danger with the residents' view of opportunity regarding Krakatoa's volcanic activity.
Step-by-step explanation:
In The Twenty-One Balloons by William Pene du Bois, a retired schoolteacher named Professor William Waterman Sherman is rescued at sea with tales of his adventures in the land of Krakatoa. The main conflict revolves around the Professor's struggle to escape Krakatoa after discovering an isolated, yet advanced civilization that is surprisingly living in fear of the island's volcanic activity. The Professor sees this dilemma from a perspective of curiosity mixed with a sense of duty to warn the inhabitants of the impending danger. No specific quote is provided, as it depends on the edition of the book, but generally, a relevant citation would demonstrate his sense of urgency regarding the volcano's threat. Conversely, the residents of Krakatoa, largely the antagonists in the story, view the volcano as a source of wealth due to the mining of its resources, often dismissive of the potential risks. An appropriate quote from the text, also depending on the edition, would emphasize their confidence in the safety measures they have taken to protect against the volcanic threat. Ultimately, the perspectives of the protagonist and antagonists are defined by the classic conflict of man versus nature where one sees danger and the other sees opportunity in the very same situation.