The answer is "the class system has fluid boundaries that allow individuals to move from one social level to another social level".
Social class alludes to a gathering of individuals with comparative levels of riches, impact, and status. Social mobility between classes is conceivable through training and certain openings. However, for example rural zones of India and other agrarian social orders utilize the caste framework, a shut arrangement of social stratification in which the populace is separated between genetic gatherings.