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In which form is energy lost as it moves up the trophic levels?
AAs mass of decomposers (option)
BMainly as heat through respiration
CAs stored DNA
DAs nitrogen gas
Answer & Solution
Correct answer: B. Mainly as heat through respiration
1. Each organism uses most ingested energy for metabolic work.
2. This metabolic activity dissipates energy as heat into the environment.
3. Hence each trophic transfer loses roughly 90% of ingested energy.
_Source: NCERT Class 10 Science, Ch 13 "Our Environment", §13.1.1_
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