A researcher initiates a study to determine whether playing organized sports helps children with anxiety feel less anxious. This study can best be classified as research.

applied

Explanation: Applied research is a methodology employed to find solution to a specific practical issue that is affecting an individual or group of people. However, Applied research is a method of scientific study and research that is used in business, medicine, and education in order to seek for solutions that may improve health, solve scientific problems or develop new technology.

Judging the similarity of two objects based on the extent to which they resemble each other is using the "Representative heuristic".

The representativeness heuristic was first depicted by analysts Amos Tversky and Daniel Kahneman amid the 1970s. Like different heuristics, making judgments in view of representativeness is proposed to fill in as a kind of mental easy route, enabling us to settle on choices rapidly.