To paraphrase a poem means to

A. summarize its theme.

B. analyze the meter.

C. determine the rhyme scheme.

D. rewrite it in one's own words

The answer is letter D.

To paraphrase a poem, you need to rewrite it on your own words. To paraphrase means to express the same meaning or thought flow in different words. It involves rewording something that is previously written or spoken.

It doesn't mean to summarize its theme, to analyze the meter, or to determine the rhyme scheme. So, D is the correct answer.