A parallel sentence mentions the same grammatical expression twice. I would go with "D". 'Passed' and 'Demonstrated' are both past tense words that express the same past tense grammatical idea.
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Answer:
A. Structure and form
Explanation:
A theme in a poem is the central idea or the "structure" of it. It helps to build off what to write and how it should be said.
Answer:compare and contrast
Explanation:
The answer is D: Carrying