Explanation: The SNDP movement was an example of a regional movement born out of conflict between the depressed classes and upper castes.

• It was started by Sree Narayana Guru Swamy (1856- 1928) among the Ezhavas of Kerala, who were a backward caste of toddy-tappers and were untouchables, denied education and entry into temples.
• Narayana Guru, himself from the Ezhava caste, took a stone from the Neyyar river and installed it as a Sivalinga at Aruvippuram on Sivaratri in 1888.
• The movement (Aruvippuram movement) drew the famous poet Kumaran Asan as a disciple of Narayana Guru.
• In 1889, the Aruvippuram Kshetra Yogam was formed which was decided to expand into a big organization to help the Ezhavas to progress materially as well as spiritually.

Source: Spectrum