Sam was playing on the jungle gym and fell off the slide onto his arm. His arm is very swollen and hurts so much he cannot move it. What might have happened to the bone in his arm?

Answer: D. It got a fracture (a break).

Explanation:
A fracture is a big word for a broken bone. Bones are hard, but if we fall very hard, they can crack or break. The doctor will take an X-ray picture to see the break and then put a hard plaster cast on it. The cast keeps the bone still so it can grow back together nice and strong.

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