Write note on ecological pyramids with suitable examples. (UPSC 2021, 15 Marks, )

'उपयुक्त उदाहरणों के साथ पारिस्थितिक पिरामिडों पर नोट लिखें।' (Write note on ecological pyramids with suitable examples.)

Write note on ecological pyramids with suitable examples. (UPSC 2021, 15 Marks, ) EN ह function dochangelang(val) { if (val != "") { window.location = val; } }