स्पंजों में नाल प्रणाली (canal system) का विकास मुख्य रूप से निम्नलिखित में से किस संरचनात्मक विशेषता के कारण होता 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?