Question

test major bones
what can we do to help prevent skeletal problems?
○ exercise
○ keep hydrated
○ healthy diet
○ wear protection when playing sports
○ all of above
○ none of above

Explanation:

To prevent skeletal problems, exercise helps strengthen bones, staying hydrated supports overall health including bone health, a healthy diet (with sufficient calcium, vitamin D etc.) is vital for bone strength, and wearing protection during sports prevents injuries to bones. So all these actions contribute, making "all of above" the correct choice.

Answer:

all of above