भू-पारिस्थितिकी तंत्र में – McqOptions

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1.	भू-पारिस्थितिकी तंत्र में ऊर्जा का महत्वपूर्ण स्रोत है
A.	रवि
B.	धरती
C.	चांद
D.	शुक्र
Answer» B. धरती

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