Final answer:
The cornea is the transparent protective coating over the front part of the eye, allowing light to enter and contribute to vision. The correct answer to the question is (E) Cornea.
Step-by-step explanation:
The transparent protective coating over the front part of the eye is known as the cornea. It acts together with the lens of the eye to form a real image on the light-sensing retina. The cornea allows light to enter the eye and is essential for vision.
The iris, on the other hand, is the colored part of the eye that adjusts the amount of light coming into the eye by opening or closing the pupil. Therefore, the correct answer to the question is (E) Cornea.