Final answer:
Ronnie is suffering from acrophobia, a type of specific phobia characterized by an intense fear of heights, which is different from a night terror sleep disorder.
Step-by-step explanation:
Ronnie experiences excessive, distressing, and persistent fear or anxiety about heights. Ronnie suffers from acrophobia, which is a specific phobia and a type of anxiety disorder. Unlike a night terror sleep disorder, where an individual experiences panic during sleep, acrophobia involves a conscious, extreme fear of heights when the person is awake and may lead to avoidance behavior or severe anxiety when in high places.
Ronnie is experiencing excessive, distressing, and persistent fear or anxiety about heights. This is known as acrophobia, a specific phobia related to heights. Acrophobia is classified as an anxiety disorder.