पारितन्त्र (Ecosystem) में ऊर्जा का प्रवाह कैसा होता है?

उत्तर: (C) एकदिशीय (Unidirectional) — Energy flow in an ecosystem is Unidirectional (one-way): Sun → Producers → Primary consumers → Secondary consumers → Decomposers. At each level, ~90% energy is lost as heat (10% rule). Matter cycles, ...