Answer:
Fred is most likely to be diagnosed with Agoraphobia which is an anxiety disorder.
Explanation:
There is an anxiety disorder called agoraphobia in which a person afraid of leaving the environment in which they are living or the environment they considered to be safe.
People who have this disorder might often feel their homes as the safest place and do not leave their homes for months. They get afraid when they go in public and a crowded place because they feel unsafe there which can generate panic attacks in them. So Fred is most likely to be diagnosed with agoraphobia which is an anxiety disorder.
