(N/A) The second law of thermodynamics states that no energy transfer is $100 \%$ efficient,and some energy is always lost as heat during the process.
In an ecosystem,energy enters as sunlight and is converted into chemical energy by producers. As this energy moves through different trophic levels,a significant portion is dissipated as heat due to metabolic activities (respiration,movement,etc.).
This aligns with Lindeman's $10 \%$ law,which states that only about $10 \%$ of the energy stored as biomass at one trophic level is transferred to the next trophic level,while the rest is lost as heat,thus adhering to the entropy principle of the second law of thermodynamics.