Geothermal energy is generated by harnessing the heat produced beneath the Earth’s crust. It is considered a highly reliable renewable energy source because, unlike solar and wind power, geothermal plants can operate continuously regardless of weather conditions or time of day. However, geothermal power plants are expensive to build and can currently only be successfully constructed in areas with specific geological features, such as hot springs or volcanic activity.
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Verbal·Craft and Structure·Text Structure and Purpose
mediumWhich choice best describes the overall structure of the text?
A
It describes a source of energy, explains an advantage it has over some alternatives, and then notes some limitations of using it.
B
It defines a source of energy, traces the history of its development, and then predicts how widely it will be used in the future.
C
It presents a problem with current energy sources, proposes a specific new technology as the solution, and then reports the results of testing that technology.
D
It compares two competing energy sources in detail, argues that one is clearly superior, and then recommends policies to promote it.