The correct answer is Structural Functionalism
It is good to distinguish structural-functionalism from anthropology with the homonymous theory of sociology. In sociology, structural-functionalist theory explains the functioning of a society based on social actions. That is, how the various actions of individuals make society work in a more or less stable way. Social actions emerge from actions, from which, in turn, social institutions arise. Influenced by Durkheim and Radcliffe-Brown, structural-functionalist sociological theory took shape with Talcott Parsons (1902—1979) and Robert K. Merton (1910—2003) in the postwar United States. However, sociological structural-functionalism, for its proponent Talcott Parsons, was not a school of thought or a theory, but a methodological stage.