Original sentence: One can earn their social status by their own achievements, which is known as achieved status, or one can be  placed in the stratification system by their inherited position, which is called ascribed status.The stratification system, which is the system of distributing rewards to the members of society, determines social status
Edited sentence: A society's stratification system, which is the system of distributing rewards to the members of society, determines social status.Alternatively, one can be placed in the stratification system by their inherited position, which is called ascribed status.One can earn their social status by their own achievements, which is known as achieved status