What should you do before physically moving evidence?

Prior to physically moving evidence, it is critical to photograph and document it thoroughly. This step ensures that there's a clear and accurate record of the evidence as it was found, capturing its condition, position, and any relevant details that might aid in the investigation. Such documentation provides vital information that can be referred back to if questions arise later regarding the evidence's integrity or context.

Identifying and properly labeling the evidence is also essential. Clear identification and labeling help maintain the chain of custody, ensuring that the evidence can be reliably tracked and referenced throughout the investigation process.

Notifying a supervisor can be an important procedural step in some contexts, as it ensures that higher authority is aware of the actions being taken with respect to the evidence. However, this step may not be universally required before handling each piece of evidence, depending on the specific protocols of the agency or jurisdiction.

The most comprehensive approach is encapsulated in the choice that combines documentation, identification, and labeling, which is why "all of the above" stands out as the most correct answer. It recognizes the necessity of maintaining integrity, accountability, and accurate records when dealing with evidence in fire investigations.