Answer:
Flexion.
Explanation:
Flexion is the movement of bones that occur at sagittal plane. Flexion refers the bending or movement of a limb or join. Flexion allows the movement of hinge joint.
Flexion movement decreases the angle between the two bones. The knee flexion decreases the angle between the femur and tibia. The movement of elbow decreases the angle between the humerus and ulna.
