The correct answer is: D. None of these
Thermal electricity is generated by using heat to convert water into steam. The steam then turns a turbine, which generates electricity. The heat can come from a variety of sources, including coal, natural gas, nuclear fission, solar energy, and geothermal energy.
Coal is a fossil fuel that is formed from the remains of ancient plants. When coal is burned, it releases heat that can be used to generate electricity. However, coal is a major source of air pollution, and its use is declining in many countries.
Natural gas is a fossil fuel that is formed from the remains of ancient animals. When natural gas is burned, it releases heat that can be used to generate electricity. Natural gas is a cleaner-burning fuel than coal, and its use is increasing in many countries.
Nuclear fission is a process in which the nucleus of an atom is split into two smaller nuclei. This process releases a large amount of energy, which can be used to generate electricity. Nuclear power plants are very efficient at generating electricity, and they do not produce air pollution. However, nuclear power plants are also very expensive to build and operate, and there is always the risk of a nuclear accident.
Solar energy is a renewable energy source that comes from the sun. Solar panels can be used to convert sunlight into electricity. Solar energy is a clean and sustainable source of electricity, but it is not always available, and it can be expensive to install solar panels.
Geothermal energy is a renewable energy source that comes from the heat within the Earth. Geothermal power plants can be used to generate electricity from this heat. Geothermal energy is a clean and sustainable source of electricity, but it is not always available, and it can be expensive to build geothermal power plants.
In conclusion, thermal electricity can be generated by using a variety of sources, including coal, natural gas, nuclear fission, solar energy, and geothermal energy. The best source of thermal electricity depends on a variety of factors, including the cost of the fuel, the availability of the fuel, and the environmental impact of the fuel.