What is a primary role of bone tissue?

• A. Filters blood
• B. Provides structure and supports movement
• C. Produces bile
• D. Regulates insulin

Answer: (B)

Bone tissue primarily serves as the body's framework, giving structure and acting as the lever system that enables movement. The rigid bones support soft tissues, protect organs, and provide attachment points for muscles, so when muscles pull on bones, the body can move. While bone also stores minerals and houses marrow for blood cell production, the core role described here is supplying structure and facilitating movement. The other options refer to tasks of other organs—kidneys filter blood, the liver produces bile, and the pancreas regulates insulin—so they don’t describe bone’s main function.