Answer:
colon
Explanation:
search it up, don't copy though
Answer:mental life; observable behavior
Explanation: Mental life has a lot to do with how psychologists focus more on the physiological research in the 1920s and 1960s, but as times goes by, they emphasize more on observable behavior. Because both mental life and observable behavior work together for a good psychological result.
Social is interaction with peers, academic is more intense focus, and physical is improved body