What is a defining characteristic of a caste system in social stratification?

A defining characteristic of a caste system in social stratification is that it is a rigid social structure where people's roles and positions are determined by birth. This means that individuals are born into a specific caste, and they usually stay in that caste for their entire lives, with limited opportunities to move up or down. For example, in some societies, a person born into a low caste might not be allowed to take certain jobs or marry someone from a higher caste. This system creates clear divisions and can lead to discrimination based on caste, affecting people's access to resources and rights. Overall, the caste system is a way that society organizes itself, often leading to inequalities that are difficult to change.