The correct answer is D. Wind. Wind is a renewable resource because it is generated by the Earth's natural processes, such as the uneven heating of the Earth's surface. Wind energy can be harnessed by wind turbines to generate electricity. Unlike non-renewable resources, such as coal or oil, wind is considered renewable because it does not get used up or depleted by human activities. As long as the sun continues to shine and the Earth continues to heat unevenly, wind will continue to be generated, making it a sustainable and renewable source of energy.
