What type of evidence includes items such as bloodstains or fingerprints?

The correct choice is individual evidence. This type of evidence is unique to a particular person and can directly link them to a crime scene. Bloodstains and fingerprints possess characteristics that can identify a specific individual due to the uniqueness of each person's genetic makeup and unique fingerprint patterns.

Individual evidence is crucial in forensic investigations as it allows forensic scientists to establish a definitive connection between a suspect and the crime. For example, if a person's fingerprint is found at a crime scene, it can be matched directly to that individual, providing strong evidence of their presence at that location.

Circumstantial evidence, on the other hand, supports a conclusion indirectly and does not directly link someone to a crime. Class evidence refers to items that can be linked to a group of people or objects but not to a specific individual. Trace evidence consists of small amounts of material transferred from one location to another, such as hair or fibers, which may not exclusively identify a single source. Thus, individual evidence stands out due to its capability of establishing a direct, unique connection to a specific individual.