Which of the following are considered common examples of physical evidence?

The choice indicating traces of ignitable liquid in flooring, fingerprints, and tool marks is considered a common example of physical evidence because these items are tangible and directly linked to the incident under investigation. Physical evidence is crucial in fire investigations as it can provide concrete information about the cause and development of the fire.

Traces of ignitable liquid can indicate arson or the presence of a chemical accelerant. Fingerprints left at the scene can help identify potential suspects or individuals who were present. Tool marks can reveal information about the tools used to commit a crime, which can assist investigators in linking a suspect to an incident. Together, these elements form a category of physical evidence that can be collected, analyzed in a laboratory, and used in court to build a case.

In contrast, the other options relate to either non-physical evidence or are contextual in nature. Fallen debris from structures can be relevant, but it does not provide the direct evidence needed to support an investigative conclusion in the same way as the physical examples listed in the correct answer. Eyewitness testimony is subjective and can be influenced by personal perceptions, making it less reliable as a physical evidence type. Meanwhile, temperature measurements can provide important contextual data but do not constitute physical evidence themselves.