The question is incomplete the correct options are :
Biomass energy and geothermal energy are both clean energy sources.
Geothermal energy and natural gas are both clean energy sources.
Solar power and wind power are both clean energy sources.
Natural gas and solar power are both clean energy sources
Answer:
Solar power and wind power are both clean energy sources.
Step-by-step explanation:
The renewable sources of energy can be defined as the energy which is present in an abundant amount. Even if it is used once it can be renewed again and again.
The power plants of solar and wind are safe and clean. The energy that is derived from them does not causes any harm to the environment.
There is no noise produced, no pollutant released and none of the organism is harmed by this practice.
Hence, the solar and wind power are clean energy resources.