Mahatma Gandhi initiated the symbolic nonviolent protest against the British salt monopoly, an event historically known as the ‘Salt March.’ This march began from his ashram in Sabarmati on March 12th, 1930, and lasted for 24 days as a crucial element of the Indian independence movement.
The Sabarmati Ashram's importance is central to understanding Gandhi's actions and strategies during the independence struggle. His decision to march from Sabarmati to Dandi was a deliberate tactic to highlight the British salt laws, which prevented Indians from independently gathering or selling salt.
Therefore, the correct location where Gandhi commenced his Salt March, from the provided choices, is Sabarmati.