How might biomass be related to energy levels?

Biomass is renewable organic material that comes from plants and animals. Biomass was the largest source of total annual U.S. energy consumption until the mid-1800s. ... Biomass contains stored chemical energy from the sun. Plants produce biomass through photosynthesis.

Explanation:

hope this helps :D

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

idk im sorry.