The use of 'like' to compare her voice to velvet makes this a simile.
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Scanning the passage: "Renewable energy sources, particularly solar and wind, have shown a 20% growth in efficiency. While hydroelectric power remains stable, biomass usage has declined due to high maintenance costs," which source has declined?
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"The novice researcher’s findings were merely preliminary; they lacked the robust data required to substantiate the ambitious claims." What does 'substantiate' mean?
