In a a person is assigned a status at birth and remains at that level throughout life.

caste system.

Explanation:

Caste system in India is the social stratification of the population on the basis of their birth in a particular caste. It has its root in ancient India where caste represent the role of a person in society. But it became rigid with time and justified by the Brahmans who holds the highest position and authority to read and write and in this hierarchy who were oppressed the most are Shudras whose position came last in ladder.

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