Which type of evidence can be categorized as trace evidence?

Trace evidence refers to materials that are transferred from one location to another and typically consists of small, often microscopic, quantities. This type of evidence includes items like hair, fibers, or soil, which can be left behind or transferred during the commission of a crime. The significance of trace evidence lies in its ability to provide connections between a suspect and a crime scene, or a victim, potentially linking them through the scientific analysis of these materials.

In contrast, other options like documents and records, photographs and audio recordings, and witness testimonies, represent different types of evidence. These are considered more direct forms of evidence that do not fall under the category of trace evidence. They involve larger, more obvious pieces of information or physical documentation that may help establish facts or context in a case, rather than relying on the small, less visible particles that trace evidence represents. Thus, hair, fibers, or soil are quintessential examples of trace evidence, making this choice the correct answer.