Answer: Pronoun
Explanation: I looked it up. lol
Answer: C. cadence
Explanation: ca·dence
/ˈkādns/
Learn to pronounce
noun
1.
a modulation or inflection of the voice.
"the measured cadences that he employed in the Senate"
synonyms: rhythm, tempo, meter, measure, rise and fall, beat, pulse, rhythmical flow/pattern, swing, lilt, cadency; More
2.
a sequence of notes or chords comprising the close of a musical phrase.
"the final cadences of the Prelude"
The dark cloud was like a stain of darkness over the wide-open plain.
(Is that too advanced?)
There was a red stain on the boy's shirt as he stood in the grassy plain.
(That's a bit simpler.)
I think its A. take action and make the world more stable.
Where is the text? If you attach the text, then I can help you write the conclusion.