Explanation:

Shri Narayana Guru

Narayana Guru was a philosopher, spiritual leader and social reformer in India. He was born into a family that belonged to the Ezhava caste. He led a reform movement against the injustice in the caste-ridden society of Kerala in order to promote spiritual enlightenment and social equality.
Vaikom Satyagraha was a satyagraha in erstwhile Travancore against untouchability and caste discrimination in Hindu society of Kerala. The movement was centered around the Sri Mahadeva Temple temple at Vaikom, in the present day Kottayam district.