What is solar energy and what is the advantage and disadvatage that you can give majority of it.

I don't really understand your question or why your topic is entitles "alkanes"

Solar energy is energy that is derived from the sun.
Although almost all energy originates from a star, this is talking about energy that is directly harnessed from the sun's light.

Can you think of why this is advantageous and disadvantageous as a source of energy?

Thanks anyway for the answer but I wasn't asking for the energy of the sun I was askind what is adv and this of doing solar energy such as solar panels for heating water

Yes. That energy comes from the sun.