Generators and alternators are mechanical sources, so yes.
Coal.
Wind
Not in the literal sense of the words "Mechanical Energy". It depends on the source of the mechanical energy.If the source is renewable, like solar or wind generated electricity, then the mechanical energy is renewable.If the source is non-renewable, like electricity from burning oil, then it is non-renewable.
Mechanical energy
That depends a lot on what you mean by "this source".
It isn't clear what you mean by "the above source".
Electricity can be used to generate more electricity through a process called electrical generation. This involves using a power source, such as a turbine or solar panels, to convert mechanical energy into electrical energy. This newly generated electricity can then be used to power more devices or be fed back into the grid for distribution.
wind
Deemed generation refers to electricity that is considered to have been generated by a specific source, even if it was not physically generated by that source. This can occur in scenarios where renewable energy certificates are utilized to track and ensure the renewable attributes of the electricity consumed.
The largest source of electricity generation globally is coal, followed by natural gas and then hydroelectric power. However, in some countries, such as the United States and China, natural gas has surpassed coal as the largest source of electricity.
it is thermal
Electric power plants are the main source of electricity generation in most regions, providing the power needed to run homes, businesses, and industries.