Text Structure and Purpose

SAT Reading and Writing· difficulty 3/5

Geothermal energy can provide consistent baseload power without burning fossil fuels. The technology, however, requires specific subsurface conditions: hot rock layers within reach of drilling, and either natural or engineered pathways for circulating water. Where such conditions exist, geothermal plants can operate continuously for decades.

Which choice best describes the function of the second sentence in the text?

  • A

    It identifies the geological conditions on which the first sentence's promise depends.

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  • B

    It restates the first sentence using different terms.

  • C

    It dismisses geothermal energy as impractical.

  • D

    It introduces a competing renewable energy technology.

Explanation

The second sentence specifies the conditions under which geothermal works. B captures this conditional function.

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