What does physical evidence refer to in forensic science?

Physical evidence in forensic science encompasses a broad range of objects and traces that can be found at a crime scene, which can include anything from fingerprints and hair strands to weapons or clothing. This type of evidence is crucial as it can be analyzed to provide valuable information regarding the incident, the individuals involved, and the sequence of events. The key aspect of physical evidence is its ability to be objectively measured and tested, making it a cornerstone of forensic investigations.

In contrast to other options, human remains, witness reports, and official law enforcement reports do not encapsulate the full scope of what physical evidence entails. Human remains are merely one subset of physical evidence, while witness reports and official documents serve very different purposes, primarily involving testimonies and summaries of investigations rather than directly relating to material evidence that can be scientifically examined. Thus, the selected answer accurately reflects the comprehensive and inclusive nature of physical evidence within the field of forensic science.