Answer:
Contrast Structure using conjunction "although"
The conjunction "although" in this sentence is used to describe contrasting ideas present in two clauses.
Explanation:
"Although" is normally used as subordinating conjunctions i.e. to connect subordinate clause to the main clause. The sentence describes two contrasting or different ideas. From the idea, that thunderstorms are more common than hurricanes and tornadoes, one expects they would be less dangerous. But in contrast it is not the case (according to the author) - they are equally dangerous. Hence "although" is used to connect two contrasting ideas of two clauses.
Bernard ignores the conversation because he knows his fate would be sealed even more if he spoke up.
Explanation:
In the conversation between Mond, John and Helmholtz he knows that Mond will have the upper hand and anything that Bernard might say about what he was willing to do against the new society by reading the texts and organizing people who fail even further.
So he stays silent and only talks up to beg Mond to reduce his sentence for his crime of doing it but his friends had until them pretty much spilled the beans and had engaged in a discussion about the things they were doing.
sure. How can I help you. Why don't you try playing some games?
Answer:
The hurricane just ripped off that man's clothes.
