The answer to this question would have to be "tone." I do hope this helps you!
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Instead of the possessive pronoun su/sus , it could be used the prepositional phrase DE + name or pronoun for clarity or emphasis. For example: los libros de usted. This is to avoid confusion because Su/sus can be use with different meanings<span>
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The correct answer is:
<em>Detailed analysis of the nutrients from typical kitchen waste</em> would be most relevant to a research paper describing the benefits of composting kitchen waste.