Final answer:
Bladder-supervision involves providing supervision for bladder-related activities to ensure proper urination and continence.
Step-by-step explanation:
In the context of sphincter control, the level of assistance that involves providing supervision for bladder-related activities is known as bladder-supervision. This means that someone is present to supervise and monitor the individual's bladder-related activities to ensure that they are able to urinate when needed and maintain continence. For example, in the case of an elderly individual with difficulty emptying their bladder, a caregiver might provide supervision and reminders to use the bathroom regularly.