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प्रश्न
Explain why pyramids of energy must always be upright.
स्पष्ट करा
उत्तर
A pyramid of energy is always upright. As energy flows from one trophic level to the next trophic level, some amount of energy is lost in each trophic level in the form of heat. Therefore, the pyramid of energy is always upright and can never be inverted.
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