निम्नलिखित में से कौन सा पैमाना या संख्या एक वर्णनात्मक तालिका है जो संख्याओं की एक श्रृंखला द्वारा हवा की तीव्रता को दर्शाती 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?