भूपरिवर्तिख़ परिस्थितिकी तंत्र में किस पोषी स्तर में आमतौर पर सबसे बड़ी जनसंख्या होती है?

The 'Drain of Wealth' theory was propounded by which Indian nationalist leader?

Which event is considered the turning point in Mahatma Gandhi's leadership in the Indian independence movement?

Which African leader is known for his non-violent opposition to colonial rule?