Which of the 3 core functions of public health falls under the 10 essential public health service of "diagnosis and investigate health problems and hazards"?

Effective Policy Development .

Explanation:

The 3 core functions of public health are

And one of the 10 essential public health services is an Effective Policy Development .

Effective policies are the way the system has to define a preset course of action in several specific situations, thus, its vital importance in the Public Health Service.

the correct answer is individualism and exchange. at this stage, children begin to question the rules, because they can see that there is more than one side to them. different individuals have different viewpoints. they won't be able to reach this stage because of ignorance, a lack of ethics or personal biases. that is because people with that characteristiscs are not able to distinguish what is good or what is bad and they can't pursue their individual interests.