The true statement among the options provided is:
Hydropower uses the kinetic energy of water to generate electricity.
Here’s the evaluation of the other statements:
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Solar energy can only be used on Earth. It can't be used in space. - This statement is false. Solar energy can be harnessed in space, and solar panels are used on satellites and other spacecraft to generate electricity.
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Wind is the most commonly used renewable energy source in the United States. - This statement is false. While wind energy is a significant source of renewable energy in the U.S., as of now, hydropower still accounts for a larger share of renewable energy generation.
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Wind energy does not use a turbine or a generator to produce electricity. - This statement is false. Wind energy is harnessed using wind turbines, which convert the kinetic energy of the wind into electricity through a generator.
So, the only true statement is about hydropower.