<span>a. After
A preposition is a word that comes before a noun that tells the reader where one noun is in relation to another noun. In the sentence, after tells when she ended the dinner. In this case "After a disastrous dinner" is the entire prepositional phrase. Sometimes the word to is considered a preposition. However, in this case, it is part of the infinitive form of the verb end.
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They make the message of the song direct and purposeful.
The short lines and repetition in the song make the message very direct. It is clear that the speaker of the poem wants his people to be let go. If the lines were long and very detailed, the listener would need to spend more effort to discern the singers message. The shortened lines give the song more power and emphasize the speaker's message.
1 st line - 5 syllables
2nd line - 7 syllables
3rd line - 5 syllables