Flow of energy through various trophic levels in an ecosystem is unidirectional and non-cyclic. Explain.

(N/A) In an ecosystem, the flow of energy is always unidirectional, meaning it moves in only one direction and is not cyclic.
The energy flow follows the path: $\text{Producers} \rightarrow \text{Herbivores} \rightarrow \text{Carnivores} \rightarrow \text{Top Carnivores}$.
According to the $10\%$ law of energy transfer, only about $10\%$ of the energy is transferred from one trophic level to the next, while the rest is lost as heat to the environment.
Because energy is lost at each step, it cannot be recycled back to the previous trophic level. Thus, the energy flow is non-cyclic and unidirectional.