Flexibility is defined as the ability to do what with the joints?

Flexibility is defined as the ability to move joints through their full range of motion. This encompasses various movements such as flexion (bending), extension (straightening), and circumduction (a circular motion involving flexion and extension). Each of these movements contributes to the overall flexibility of a joint, allowing it to perform effectively in diverse activities and exercises.

By including flexion, extension, and circumduction, the definition captures the dynamic capabilities of joints, which is essential for athletic performance as well as everyday functions. Therefore, the correct answer accurately reflects the comprehensive nature of flexibility as it pertains to joint movement.