Assertion (A): In an ecosystem, the flow of energy is always unidirectional. Reason (R): Energy captured by producers does not revert back to solar input, and it is progressively lost as heat at each trophic level.
- ABoth A and R are true and R is the correct explanation of A
- BBoth A and R are true but R is NOT the correct explanation of A
- CA is true but R is false
- DA is false but R is true
✓ Correct answer: A
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