The part of the eye that changes shape to adjust for an object's distance is the?

The lens of the eye plays a crucial role in focusing light onto the retina by changing its shape, a process known as accommodation. When an object is located at varying distances, the lens adjusts depending on how far away the object is; it becomes more rounded for nearby objects and flattens out for those that are farther away. This accommodation allows us to maintain a clear image of objects at different distances.

The pupil, while important in regulating the amount of light entering the eye, does not change shape to focus on varying distances. The cornea provides much of the eye's focusing power, but it does not have the same ability to adjust shape as the lens does. The retina is the light-sensitive layer at the back of the eye where images are projected and processed, but it does not have a role in changing shape to accommodate distance. Thus, the lens is the correct part of the eye recognized for its ability to adjust shape for focusing on objects at different distances.