English Comprehension — quick quiz

Read the passage and answer the question: Mahatma Gandhi believed in the principle of non-violence or 'ahimsa'. He used peaceful methods like civil disobedience and non-cooperation to fight against British rule. His famous Salt March in 1930 was a protest against the British salt tax. Thousands of Indians joined him on this 240-mile march to the sea to make their own salt. This movement inspired people across India to join the freedom struggle. Gandhi proved that great changes can be achieved without violence. Question: What was the primary purpose of the Salt March?