Dr. Azure is conducting a research in the area of psychophysics. Psychophysics is described to be a branch of psychology where it deals with the relationship of a mental phenomena and as well as the physical stimuli that Dr. Azure is doing above in the scenario.
Answer:
Hair
Explanation:
The scientist predict that the contamination occurred several months ago. Under normal circumstances, most organisms would no longer have a trace of exposure in their urine or blood after 3 months. If the organisms exposed to the radioactive three months ago and do not come near that area again within 3 months, the scientist wouldn't be able to identify it.
But, if that substance got into their hair, it will last way longer than that. Hair Analysis is very common to be used among forensic toxicologist to identify contamination that occurred months because of this.
It is strongest in people who have no attachments.