The correct answer is Demonstrative evidence.
This evidence is used to recreate or illustrate the crime that has happened a while before. Sometimes there is a need to recreate the story of crime to find out the criminal and to understand the correct situation of the crime. The third person who is observing the whole scene can understand the crime, can help in determining the criminal and the important evidences. Examples of demonstrative evidence include forensic animations, sound recordings, x-rays, videotapes.