Biomass is organic material made from plants and animals (microorganisms). Biomass contains stored energy from the sun. Plants absorb the sun's energy in a process called photosynthesis. The chemical energy in plants gets passed on to animals and people that eat them.
Biomass is a renewable energy source because we can always grow more trees and crops, and waste will always exist. Some examples of biomass fuels are wood, crops, manure, and some garbage.
When burned, the chemical energy in biomass is released as heat. If you have a fireplace, the wood you burn in it is a biomass fuel. Wood waste or garbage can be burned to produce steam for making electricity, or to provide heat to industries and homes.
**All above information taken from EIA Energy.
Is this all?
Absolutely not. Read more to find out about biomass energy.
How is biomass energy formed? Use the flow chart below to answer this question.
Chart taken from Texas Biomass Energy
Biomass: Energy from Plants and Animals by 
Biomass: Fueling Change by