How does the eye adjust to take account of an increase in brightness?

The way the human eye sees the world around it depends on the refraction of light through a naturally occurring convex lens composed of transparent material. The cornea, iris, pupil, ciliary muscles, eye lens, optic nerves, and retina are all components of the human eye.

The cornea of the eye allows light to enter, which then travels through the pupil and lands on the eye lens. Since the eye lens is a convergent lens as we all know it concentrates all light into one spot, creating a genuine and inverted image of the object. Also, the eye's pupil contracts as light increases.
When the brightness increases that time pupil of the eye shrinks and less light will enter the eyes.
Hence, the correct option is "Human eye– The pupil helps to adjust the light".