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Problem 9 - Entrance Test

____________. Wind farms, for instance, harness kinetic energy to generate electricity, while solar panels convert sunlight directly into power. Geothermal systems utilize heat from the Earth's interior, and hydroelectric dams rely on the force of moving water. Which sentence would best introduce the paragraph?

Correct: B

The subsequent sentences provide specific examples of different types of renewable energy sources (wind, solar, geothermal, hydroelectric). Therefore, the most fitting topic sentence is one that introduces this variety, which option B does directly.