I believe that is true.
"Fibrin strands form a net that entrap more platelets and blood cells, producing a clot that plugs the break." -Google
Answer:A black hole is a place in space where gravity pulls so much that even light cannot get out.
Explanation:
True the brain is constantly growing for the better or worse
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: