Answer:
Maisie can be diagnosed with having a specific phobia.
Step-by-step explanation:
Specific phobia is characterized by the presence of a persistent and recurring fear that is excessive and unreasonable to a specific object or situation that triggers a strong anxiety reaction. That is, specific phobia is characterized by a fear of a certain thing, but this fear has no reason to exist and is so intense that it begins to disrupt a person's normal activities. An example of this can be seen in the question above, where Maisie is so afraid of heights that it gets in the way of attending compulsory classes, and that fear has no reason to exist.