1. Population groups philosophy

2. Mission statement social services

3. Human services target groups

1. Population groups: target groups

2. Mission statement: philosophy

3. Human services: social services

Explanation:

This is the best way to connect these terms. A population group refers to a section of the population that is discussed or targeted in a particular project or campaign. These can refer to ethnicities, ages, or some other social characteristic. A mission statement refers to a phrase or an idea that drives the work of a particular organization. Finally, human services refers to a range of social services that are usually provided by the government or by organizations. These usually include services such as healthcare or education.