Answer: Early detection and intervention
Explanation
According to the American Academy of Pediatric, auditory screening should be performed in the early months of life (below 6 months) because early detection of hearing loss within this age bracket enables for early intervention service. This intervention service involves meeting professionals who would help the family and the child learn to communicate effectively or getting a hearing device for the child (e.g. Hearing aids) where necessary. Support groups are also made available for the guardians of the child.
I believe it is either one or five, i am not sure though.
because they work with a lot of people and they know when they see someone unhealthy
By telling your community how to protect themselves in their enviroment
That is TRUE because when you get older your bones and muscles start to decrease so being physically active will make your bones and muscles stronger as they decrease.