Which is a compound sentence using a subordinating conjunction?

most brazilians, speaking portuguese, have indian or african customs.

most brazilians speak portuguese, although many of their customs are indian or african.

most brazilians speak portuguese, but many of their customs are indian or african.

most brazilians speak portuguese; many of their customs are indian or african.

the third choice would be the correct answer because it uses the subordinating conjunction "although"

Example: Monica went shopping after she finished her homework. Note on punctuation: If the subordinating conjunction in a complex sentence is whereas, though, although, or even though, a comma is needed to show separation between the two clauses.

well people will have to mark your answer as the best answer. and from that u receive crowns.

~batmans wife dun dun

the sentence that best describes the tone of the passage from the radio broadcast compared to the passage from the book is b. the radio broadcast has a more surprised tone.

consider the text evidence: in the passage from the book, the description is more matter-of-fact. it is simply describing the things resembling little grey snakes, but there is no urgency in the description. on the other hand, in the passage from the radio broadcast, there is definetely urgency (you can tell from the expression used, "good heavens", which clearly indicates surprise.)