Final answer:
The correct answer to the student's question about an example of a prosthesis is (A) An artificial eye to replace an eye that has been lost, as it is a device made to substitute for a missing body part.
Step-by-step explanation:
A prosthesis is a device designed to replace a missing body part. In the context of the student's question, the answer is (A) An artificial eye to replace an eye that has been lost. Prostheses such as artificial eyes, artificial limbs, and joints (like hips and knees) are created to improve the quality of life for individuals who have lost a limb or part of one due to injury, disease, or a congenital condition. Significant advancements have been made in the design and material science behind prostheses, leading to the development of durable and functional artificial joints that provide substantial pain relief and improved mobility after surgeries such as hip arthroplasty.