Final answer:
The proper signal word panel for identifying a hazard that may cause death or serious injury is Danger.
Step-by-step explanation:
The proper signal word panel for identifying a hazard that may cause death or serious injury is Danger. This signal word is used to alert individuals to hazards that have the potential to be life-threatening or cause serious harm. An example of a hazard that would warrant the use of the Danger signal word is a high voltage electrical hazard.