Step 1: Understanding the Question:
The question requires identifying an energy source that is naturally replenished on a human timescale and does not deplete over time.
Step 2: Detailed Explanation:
Renewable Energy: These are energy sources derived from natural processes that are constantly replenished. Examples include sunlight, wind, rain, tides, waves, and geothermal heat.
Wind Energy: Kinetic energy from the wind is captured by wind turbines and converted into electrical power. Since wind is driven by solar heating of the atmosphere, it is inexhaustible and clean.
Non-Renewable Energy (Fossil Fuels): Coal, crude oil, and natural gas are formed over millions of years from organic matter. They are finite and their consumption leads to depletion.
Coal: A solid fossil fuel formed from plant remains. It is high in carbon and non-renewable.
Crude Oil (Petroleum): A liquid fossil fuel extracted from underground reservoirs. It is the primary source of transportation fuels but is finite.
Natural Gas: Primarily methane, it is found alongside oil deposits and is a non-renewable fossil fuel.
Step 3: Final Answer:
Among the given options, Wind energy is the only renewable source.