Final answer:
Hair is considered trace evidence in forensic science, as it can contain DNA which is crucial in linking a suspect to a crime scene.
Step-by-step explanation:
Trace evidence refers to small physical materials that can be transferred during a crime. Out of the given options, hair is considered trace evidence. Hair can provide valuable information such as DNA analysis and determining the presence of substances in the body. It can be used to link suspects to a crime scene or identify unknown individuals.
Out of the options provided, hair is considered trace evidence in forensic science. Trace evidence includes any small or microscopic material that can be transferred from one location or object to another, providing a link between a crime scene and a suspect. In forensic investigations, hair can be particularly valuable as it could contain DNA, which can be analyzed to identify a person or to match a suspect to a crime scene with a high degree of certainty.