Answer:
Chlorophyll
Explanation:
chlorophyll is a photosynthetic green pigment that are found in mostly plants and algae, and they help plants absorb energy from the sun. they can be found in the chloroplast.
Alternative energy sources are those that do not deplete natural resources and do not harm the environment.
Options A, B, and C are all fossil fuels, which we know can be depleted and harm the environment.
The only valid option here is D, Geothermal energy.
Geothermal energy is both renewable and environmentally friendly.
