is one of a group of sleep disorders in which unwanted

This question is incomplete. I've found the complete question online. It is as follows:

is one of a group of sleep disorders in which unwanted, disruptive motor activity and/or experiences during sleep play a role.

Parasomnia is one of a group of sleep disorders in which unwanted, disruptive motor activity and/or experiences during sleep play a role.

Explanation:

Parasomnia is a category of sleep disorders. A person who has parasomnia may find it difficult to wake up in the morning, for their sleep has been disturbed by abnormal behaviors, dreams, perceptions, emotions, and movements. Examples of parasomnia are: sleep terrors, sleep-related eating disorder, and sleepwalking (somnambulism).

depends on what they need

answer; which categories of people are most at risk of becoming a criminals;