What are the options? Need to see the poem or options to answer this.
Your first option is correct.
EXPLANATION:
your first option is correct because this is a grammar question. When you use "an" you're using it in front of a vowel. The only sentence starting with a vowel is the first one. The others don't sound right when you use "an" in front of it instead of "a".
I hope I helped! :)
Isabel Burnell wanted to impress her classmates with the new doll's house<span>. Aunt Beryl did not consider the feelings of others. Lady Macbeth smears the sleeping groom with King Duncan's blood. - hope this helps</span>
Republican by nature, Brutus never tried to hide his political convictions. Married to Cato's daughter, his cousin sister Porcia, he wrote a text extolling the qualities of his deceased father-in-law. Cesar was very fond of him and respected his opinions very much. However, Brutus, like many other senators, was not satisfied with the state of the Republic. Cesar had been appointed perpetual dictator and had passed several laws that concentrated power in his hands. It was rumored that only the crown was missing to match any king. The final period of the monarchy in Rome was a bad memory. The Romans had replaced royalty with the Republic and the more traditional did not want a return to such a system. Brutus was finally motivated to join the conspiracy by anonymous letters sent to him in which Rome asked for help. Brutus started a conspiracy against César along with his brother-in-law and friend Gaius Cassius Longinus and other senators. In the Ides of March (March 15, 44 BC), a group of senators, including Brutus, murdered César in the theater of Pompey.