Answer :
When measuring the energy transfer between trophic levels, only the energy that makes up the dry weight of the body mass can be measure which is known as biomass.
Each trophic level's energy content diminishes as it progresses through an ecosystem. At any given trophic level, only 10% of the energy is transmitted to the next level during energy transfer; the remaining 90% is primarily wasted as heat during metabolic activities. Biomass is a biologically sustainable energy source that can be converted into fuel and heat and is derived from live or recently living plant matter, such as trees, crops, or animals. Bio implies life, and mass refers to objects. Because there is no end to the supply of biomass, it is a renewable energy source.
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