The diagnosis will be variant creutzfeldt jakob disease or as called as vCJD. The variant creutzfeldt jakob disease is an intermittent and fatal human neurodegenerative illness. The ingestion of food of bovine origin contaminated with the agent of bovine spongiform encephalopathy which is a disease of cattle and has been strongly connected to the existence of vCJD in humans.
Observation is broken up into three parts. The first is the date. Then you have the activity and last you have a brief description of what is being observed.
When your body temperature is too high your blood vessels will dilate then your sweat glands secrete fluid and the heat is lost from the body.. there for without sweat you would “heat to death”
In this question, there are no options given to choose from. So i would answer this question based on my knowledge. The most likely cause of the observed variation is adaptation and evolution. The birds of that island adapted to the food source and then they evolved as per the requirement of the place and food source.
The smallest thing they study is cells, i think!
hoped this helped!!