Which literary technique is most prominently used throughout Edgar Allan Poe's 'The Fall of the House of Usher' to foreshadow the tragic collapse of both the family and the physical structure?

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?