Final answer:
The act of sending an apprentice to find nonexistent striped thread is an example of hazing, which is a ritual in initiating a person into a group.
Step-by-step explanation:
The scenario described where a tailor sends an apprentice to find a nonexistent striped thread is an example of hazing. Hazing refers to the practice of rituals and other activities involving harassment, abuse, or humiliation used as a way of initiating a person into a group. In this case, sending the apprentice on a fool's errand is a form of initiation into the trade or group of tailors. It is not an example of socialization, which is the process of learning to behave in a way that is acceptable to society; nor divestiture tactic, which involves stripping away the individual's existing identity to create a new one; nor debasement, which is the act of lowering the status, character, or quality of someone or something.