Public health protects and improves the health of which of the following a.) families
b.)entire population
c.) children
d. individuals

Public health protects and improves the health of (as the name implies) A- families, B - entire population.

Public health is organized towards giving out policies which are supposed to help a family or an entire population become more healthy or at least stay more healthy. Policies that are given by public health services are usually advice that is being given with the most evidence-based backing. 

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