The chemist would like to study a leaf changing colour.i.e. about the reaction behind it.
Answer: Accommodation and convergence
Explanation: accommodation and convergence is a depth cue associated with reflex action of the eye, that is, the involuntary movement of the eye in response to a particular stimulus. Accommodation convergence explains the behavior of the eye that is, changes in shape of the lens and size of pupil with respect to the distance of objects from the eye.
As objects get closer to the eye, the eyes move inward and feels like eye muscles are working. When the objects recedes the muscles become relaxed.
Yes because psychology must follow certain and specific rules and conducts
