Answer:
Liminality
Step-by-step explanation:
Liminality was a stage in the ritual process which was associated with change or ambiguity. A woman going through first menstruation cycle was considered to be going through a major change and was expected to become a mature woman now. Hence, they were considered to be upgraded from their pre-ritual status and were supposed to be in a state of transition. The reason they were separated from the cohort was because they were expected to introspect and grow as a person and transition from a girl to a woman by the time they return to the cohort.