Choose the poem that uses repetition.

 - The sun's heat will give out in ten million years more—
And he worried about it.
It will sure give out then, if it doesn't before—
And he worried about it.
 - I'm not a chicken; I have seen
Full many a chill September,
And though I was a youngster then,
That gale I well remember.
This poem uses repetition. It repeats words, phrases, or lines.
And he worried about it.
And he worried about it.