Answer:
Solar energy
Step-by-step explanation:
Solar energy is the best known example of renewable energy.
A renewable energy is that which comes from a source that has endless potential, like the sun, and from which we can obtain energy continuously doing a minimum of damage to the planet, without producing harmful chemicals that are not good fot the atmosphere.
This is why solar energy is a renewable energy, because the sun is an inexhaustible source of such energy.
Other examples may be wind power or hydropower energy.