The answer is Rhythm because a Stanza is basically just a paragraph, so that is eliminated. Next, Rhyme is the end word having same ending sound, and that does not have to do with stress syllables. Lastly, lyric is the words to a song, so that is also incorrect, leaving us with Rhythm, which is the beat with certain stress on certain words. Hope this helps! :)
I believe it refers to swords.
Please list out the choices, I can't help with so little information