The pigment that determines the color of a person`s eyes is located in the iris, as mentioned in option 3. The iris is the colored part of the eye that surrounds the pupil. It is made up of a layer of pigmented cells that contain the pigment responsible for eye color. The amount and type of pigment present in these cells determine the color of the eyes. The color can range from blue, green, hazel, brown, or even variations within these colors.
The cornea, mentioned in option 1, is the transparent front part of the eye that covers the iris and pupil. It plays a role in focusing light onto the retina. The choroid, mentioned in option 2, is a layer located beneath the sclera (the white part of the eye) and supplies nutrients to the retina. The vitreous body, mentioned in option 4, is a jelly-like substance that fills the inside of the eye, helping maintain its shape.