Final answer:
Forensic entomology supports criminal investigations by indicating the time of death, if a body has been moved, the duration it was undisturbed, and possible drug use of the deceased, indirectly assisting with determining the source of trauma, abuse, or illicit drug use.
Step-by-step explanation:
Forensic entomology can help identify various aspects in a criminal investigation. The presence of certain insects, at various stages of their development, can give investigators clues about the time of death, if a body has been moved, length of time a body has been left undisturbed, and even whether the deceased had been using drugs prior to death. While it is not directly used to determine the source of trauma, forensic entomology can contribute to a wider understanding of the events surrounding a person's death. Therefore, the correct answer to the question of whether forensic entomology can help identify the source of trauma, abuse, or use of illicit drugs in a criminal investigation is d. all of the above.