Which of these most directly impacts a person's physical health?
a. personal relationships
b. amount of sleep
c. where you live
d. number of friends

I think the amount of sleep you get impacts your physical health the most. If you are always tired instead of wanting to work out you'll just want to sleep. Or you won't have the energy to workout so you don't.

Anxiety disorders, attention deficit hyperactivity disorder (adhd, add), and autism spectrum disorder (asd). (source: )

Ithink the answer is c.  hope this is right and