<span>Poem with a Refrain </span>– Poetry in which a word, phrase, line, group of lines, or stanza is repeated at a regular intervals. In music, this is usually called a "chorus".
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They were Japanese citizen
A word or phrase naming an attribute, added or grammatically related to a noun to modify or describe it.
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I would go with:
A theme is best written as statement because a theme is main thing of a story, the author could also use a statement in a story to make it seem more alive or more real.
I Hope my answer worked for you :)