The answer is c, your lungs
Not one specific person discovered medicine
Answer:
Not enough information is given but my mom is in the medical feild and she says that a condition common with age is presbyopia. It causes the leanses in your eye to become less flexable and less able to thicken therefore less able to focus on near by objects. Another is catteracts which I assume you already know about so I will not explain.
Explanation:
Yellow Marrow is common in the skeleton in old age but not in a childhood skeleton.
It's hard to tell that early, but some doctors can catch it in time. Signs would be heart defects or growth delays.
