Build Solar Water Heater

i need examples of renewable energy resources for a science project. it is due in wed 3rd dec and i need the examples because i am writing a letter explaining what you could use instead of non-renewable energy resources and i need to write down all of them. please could you help peoples, 10 points if you do. and please can i not have any negative answers about looking it up, because it doesn’t give me the full works if you know what im saying.

I have a science project and I have to expalin to the judge what happends during the process of solar energy. Can you please summurize it in simple, easy to remember terms?

i have a solar water heater in my residence i want to know wheather it is safe to drink that water if we take preacaution while storing and collection from the solar water heater/