The correct answer is Salt Satyagraha. Explanation & Key Takeaways: • Gandhiji's famous Dandi March in March 1930 heralded the start of the Civil Disobedience Movement movement. • On March 12, 1930, Gandhiji set out from Sabarmati with 78 followers on a 241-mile march to the coastal town of Dandi on the Arabian Sea. • There, Gandhi and his supporters were to defy British policy by making salt from seawater. • At Dandi, thousands more followed his lead, and in the coastal cities of Bombay and Karachi, Indian nationalists led crowds of citizens in making salt. • Civil disobedience broke out all across India, soon involving millions of Indians, and British authorities arrested more than 60,000 people. • Gandhiji himself was arrested on May 5, but the satyagraha continued without him. • It was the start of the civil disobedience movement which commenced as Mahatma Gandhi broke the salt law on the coastal town of Dandi on the Arabian Sea • Dandi March is also known as Namak Satyagrah or Salt Satyagrah. • The Salt March was a 24-day Salt March, which was non-violent in nature, is historically significant as it led to the mass Civil Disobedience Movement.