Which of the following is the school of psychology that studied the adaptive significance of consciousness and fostered much of the work in applied psychology in the early twentieth century?

Structuralism focuses on breaking down mental processes into their most basic components, emphasizing the structure of the mind rather than its function. While it laid the groundwork for psychology, it does not address the adaptive significance of consciousness, which is central to functionalist thought.

Atomism is a philosophical concept rather than a psychological school, relating to the idea that complex phenomena can be understood by analyzing their simplest components. This term does not directly connect to the study of consciousness or behavior in psychology and is not recognized as a school within this discipline.

Behaviorism concentrates on observable behaviors and the responses to environmental stimuli, largely dismissing internal mental processes, including consciousness. While it contributed significantly to psychology, it does not focus on the adaptive significance of consciousness as functionalism does.