describe how a alternative energy source works
Usually an "alternative energy source" is one that is not now a major contributor to our energy supplies. That would make "alternative energy" anything that is not based on fossil fuels of one sort or another. Some people exclude nuclear energy from the "alternative" universe
Department of Energy
Yes, if there is sufficient wind source for the area that would be a great alternative.
It would utilize renewable energy sources and create less pollution
It depends which country you are referring to
An alternative resource, just as the term implies is a source of something which is different from the most common source. For example the most common source of automotive fuel is fossil fuels pumped from the ground, however it is possible to make automotive fuel from corn oil or from sugar. These would be alternative resources. These will help people in the future!
Geothermal, because it is one of the easiest to use and install.
That would be wind! Wind is a renewable energy source (it can generate electricity). Wind also has its origins in solar energy.
Electricity generated from renewable sources (solar, wind, water etc) would be an alternative energy source and would easily cover cooking and heating. It would protect the environment by reducing the amount of fossil fuel burnt, and also because it has no dangerous carbon dioxide emissions that are causing global warming.
Geothermal energy would be the renewable energy least dependent on the weather. Heat from underground is used to produce steam and generate electricity.
Any alternative energy source can help achieve this. The question is whether you can find a practical way to use such energy.