Osteoporosis is a condition characterized by bones doing what?

• A. A condition where muscles are inflamed
• B. A disease of the heart valves
• C. A disorder of the nerves
• D. A condition in which the body's bones become weak and break easily

Answer: (D)

Osteoporosis is about bone strength. It causes bones to lose density and become porous and fragile, so they can fracture more easily than normal bones. This fragility means fractures can happen even with minor stresses, like a light fall or simple bump. The other options describe problems with muscles, heart valves, or nerves, not bone fragility, so they don’t fit osteoporosis.