Answer:
Structural mobility
Step-by-step explanation:
The term Structural mobility refers to mobility that occurs because of changes in stratification hierarchy itself.
It is a vertical movement of a specific group or person (the group or person moves higher in the social structure) relative to others. This mobility takes place because the structure changes and not necessarily because the person does something to move.
In this example, the person you know came from a small town where his parents had a farm and after graduating he got a job in retail selling clothing.
From a sociological standpoint, this person moved higher in the social structure (from farming to selling) and thus, he experienced Structural mobility.