निम्नलिखित में से कौन सा एक कृत्रिम (मानव निर्मित) पारिस्थितिकी तंत्र है?

The Dandi March, also known as the Salt Satyagraha, was led by which influential leader?

Which act formally granted independence to India, marking the end of British rule?

Who was the key figure in establishing the Indian National Congress?