Option 1: Hydroelectricity is a source of renewable energy. It is generated by harnessing the power of moving water, such as rivers or dams, to turn turbines and generate electricity. This process does not deplete the water source and can be used continuously.
Option 2: Solar energy is also a source of renewable energy. It is obtained by harnessing the power of the sun`s rays through solar panels or mirrors. Solar energy is abundant and does not produce any greenhouse gas emissions.
Option 3: Fuel cell is not a source of renewable energy. Fuel cells use a chemical reaction between hydrogen and oxygen to produce electricity. However, the hydrogen used in fuel cells is typically obtained from fossil fuels, which are non-renewable resources. This makes fuel cells dependent on fossil fuel extraction and combustion.
Option 4: Wind energy is a source of renewable energy. It is generated by using wind turbines to convert the kinetic energy of wind into electricity. Wind is abundantly available and does not produce any emissions or pollutants.
In conclusion, option 3, fuel cell, is not a source of renewable energy because it relies on non-renewable fossil fuels for its operation. The correct answer is option 3.