According to Locard's principle, what is stated about entering a location?

Locard's principle, often summarized as "every contact leaves a trace," asserts that whenever someone enters a location, they will inevitably disturb the environment and leave behind some evidence, however small. This principle is crucial in forensic science, as it underscores the importance of crime scene integrity and the potential for evidence to be collected that links individuals to specific locations.

The concept highlights that physical evidence, such as fingerprints, hair, or fibers, can be deposited or removed during the act of entering or exiting an area. Therefore, the assertion that it is impossible to enter without changing it aligns with the reality of physical interactions with the environment, making this the correct choice. Understanding this principle is essential for any criminal justice professional, as it lays the groundwork for crime scene investigation and evidence collection techniques.