A(n) blank is an unwanted, intrusive, and often unpleasant thought that causes an increase in anxiety.

a)compulsion
b)phobie
c)obsession
d) Panic attack
e) Hallucination

I believe the answer is E

Which word do you think best fits the definition?

http://dictionary.reference.com/browse/hallucination

http://dictionary.reference.com/browse/obsession

After reading the definitions of hallucination and obsession i think the answer is obsession

A(n) blank is an unwanted, intrusive, and often unpleasant thought that causes an increase in anxiety.
a)compulsion
b)phobie
c)obsession
d) Panic attack
e) Hallucination

Yes, you're right.

The correct answer is c) obsession.

Obsessions are unwanted, intrusive, and often disturbing thoughts, images, or urges that continuously enter a person's mind. They are typically accompanied by anxiety and can cause significant distress. People with obsessive-compulsive disorder (OCD) often experience obsessions, which can lead to the development of compulsions.

To arrive at the correct answer, you can rule out options like a) compulsion and b) phobie as they both do not represent the definition given. Option d) Panic attack represents a sudden onset of intense fear and physical symptoms, not unwanted thoughts. Option e) Hallucination refers to perceptual experiences that are not based on reality, rather than intrusive thoughts. Therefore, the most appropriate answer is c) obsession.