Answer:
Highest: Braham so it would be Priests: Single spiritual power that Hindus believe lives in everything.
Second: Kshatriya so it would be Warriors: Second level of the varnas in the Hindu caste system; WARRIORS.
Third: Vaishyas so it would be Artisans and Merchants: 3rd class of the caste system (worker class, the legs of purusha-sakta.)
Fourth: Shudra so it would be Peasants: The lowest of the four classes of the caste system, traditionally made up of servants and laborers.
Lowest: Untouchable/Harrigan/Dalit so it would be Untouchables: lowest of the low, did all of the dirty jobs, still many of them today that are in horrible living conditions.