Aclinical child psychologist compares the depression scale scores of urban foster children who range from 5 to 12 years of age. this research design is called

The answer is cross-sectional study. It is a kind of observational study that examines data composed from a populace, or an illustrative subset, at an exact point in time, this is what you call cross-sectional data. Cross-sectional studies include data gathered at a clear time. They are frequently used to measure the occurrence of severe or long-lasting circumstances, or to a response in questions about the reasons of illness or the consequences of interference. 

answer; archaeologists;

answerexpressing public opinion and morality;