In psychology, the focus is on the individual. in sociology, the focus is on group-level dynamics and social structures above and beyond the individual. sociology's focus is:

Which statement is correct? the speed of the light ray is the same in air and medium a. the speed of the light ray is the same in air and medium b. medium a and medium b have different densities because light refracts at different angles. medium a and medium b have the same density because the light ray strikes both at the same angle.