Dementia and Delirium are two somewhat broad biological phenomenon that are biological causes of mental illness. These interfere with biological processes with the brain. If we wish to be more specific, Cancers, Alzheimer and Parkinson's Disease can affect the brain by pressing on important aspects (Brain Cancer's) and/or cause progressive degeneration (Alzheimer and Parkinson's)
I think c would be the answer
True- because they realize the health risk, and how much it effects them
C. Ross's fitness level will diminish from what it was two months ago.
30% of homeless people have been though substance abuse
