Which of these renewable energy technologies is used to harness wind power?

The technology specifically designed to harness wind power is wind turbines. These devices convert the kinetic energy from the wind into mechanical energy, which is then often transformed into electricity. Wind turbines consist of large blades that rotate when the wind blows, driving a generator that produces electrical power. This method of energy generation is considered a clean and renewable source, as it does not emit greenhouse gases during operation and utilizes a naturally occurring resource.

In contrast, solar panels focus on converting sunlight into electricity, while biomass systems generate energy from organic materials. Geothermal heat pumps utilize the earth's stable temperatures to provide heating and cooling, rather than converting wind energy. Thus, wind turbines stand out as the correct choice for harnessing wind power.