Diane, a psychologist, is examining the intrinsic factors that make stella ambitious and passionate about accomplishing her goals but make cameron indifferent to the goals assigned to him. in this scenario, diane's research fits best into the area of specialization known as

The research fits best in the behavioral psychology because this interprets as to how Stella became ambitious and passionate because of the interaction of the environment which are factors that also affects how Cameron thinks and does. This supports the idea that they only do what they need to do because of how they will respond with the environment around them.

Tobacco would be the answer . good luck!