Answer: Vague
Step-by-step explanation:
As the adulthood starts to begin,it starts to is considered as vague because it is considered to unpredictable and unclear.As the emerging adulthood is found in a person , the feature of being insecured and impreciseness is present.
For example of vagueness in activities during the adult age of a person can be seen in driving , intimate relationship,drinking , voting etc during their legal age.