What type of investigation includes determining if a death was natural or the result of criminal activity?

The correct answer is an inquest. An inquest is a judicial inquiry to determine the cause of a death, particularly when the cause is unclear or potentially related to criminal activity. During an inquest, evidence is presented to ascertain whether the death was the result of natural causes or if it may have involved foul play. This process often involves testimony from various individuals, including law enforcement, medical personnel, and witnesses.

An autopsy, while related to the examination of a body to determine the cause of death, is more focused on the medical examination itself rather than the judicial inquiry aspect. It may contribute to the findings in an inquest but does not itself determine whether a death was natural or criminal in a legal context. An inspection may involve reviewing crime scenes or forensic evidence but lacks the formal procedural context of determining cause in the same way an inquest does. An investigation report presents findings from a broader investigation and may summarize conclusions but does not specifically focus on the judicial determination of death causes as an inquest does.