Answer:
i believe it is a sentence fragment
Explanation:
because a dependent clause cannot stand on its own as a complete sentence
I would say the correct answer is that the insane live in a reality of their own.
The protagonist of the story wasn't always insane; however, over time, he grew mad because of his landlord's eye of a vulture. He began seeing things, thinking that the eye made him do crazy things, such as kill the old man. After that, this mad man kept hearing the dead man's heart beating, which is how he revealed his crime to the policemen who came to the house to investigate.
Explanation:
A witness would be someone that has experienced something at first hand, having saw something from a different perspective. An ally is someone who is acquainted with you, or someone you could trust. A witness cannot be an ally if you are against their side in some form or way. A witness can be an ally if it is your best friend or someone you trust to prove you innocent.
Basically, a witness is a neutral term that describes someone that saw something. While an ally refers to mutually acceptable.