What should an investigator assess during preliminary activities at a fire/explosive scene?

The correct choice focuses on a comprehensive assessment of various factors that can influence an investigation in fire or explosive scenes. By considering wind speed, water collection, and structural damage, the investigator can gather critical information that could clarify the cause and effects of the fire or explosion.

Wind speed is crucial because it can affect the spread of fire, impacting how the fire developed and potentially aiding in understanding its origin. Water collection is important as it can reveal firefighting efforts and the conditions of the scene after suppression activities. Understanding structural damage is essential as it helps determine how safely investigators can navigate the scene and examine the evidence.

This holistic approach allows investigators to form a more accurate picture of the events leading to and during the incident, which is vital for gathering evidence and establishing the facts surrounding the fire or explosion.