We can use process of elimination to work out what the correct answer to this question is. Looking at the first choice, repetition of singing, this is an unlikely answer. Singing is repeated only twice and does not add any rhythmical elements to the excerpt itself. We can cross it off the list.
The second choice, the name of the song evoking setting, is a really good one. It adds authenticity to the narrative and allows the reader to more clearly picture the setting of the story. We'll come back to this one.
The third choice, the song showing a conflict between generations, seems unlikely since it is describing a mother raising a child which implies love, not conflict. This is not a good answer.
The fourth choice, makes the readers feel like they are listening to a nursery rhyme, is very unlikely as the little one comment they reference is at the very end. This excerpt does not have the cadence that a nursery rhyme does, so this is not a good answer.
Return to the second answer choice. This is the best answer here because, as I stated, it helps place the reader in the area or country in which the story takes place. This is important because it's going to add authenticity to the narrative itself.
B is correct: The use of traditional African language to name the song, “Nkosi sikelel’ iAfrika," transports readers to the setting of the story and gives it a heightened authenticity.
Yes, Because the part of the sentence "Although it is pretty" won't be able to function on it's own as a proper sentence. However the sentence "winter isn't as pretty as fall", Is a independent clause at the end of the sentence. Hope I helped, Look at the images, It will help! :D