Civil Services OPSC OAS Mock Test Series 2025 General Knowledge Ecology and Environment Ecology and Functions of an ecosystem

ସମସ୍ତ ଜୀବଙ୍କ ପାଇଁ ଶକ୍ତିର ପରମ ଉତ୍ସ କଣ?

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ଜ୍ୱାରଭାଟା ଶକ୍ତି
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ସୌର ଶକ୍ତି
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ଜଳବିଦ୍ୟୁତ୍ ଶକ୍ତି
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