What is a characteristic of spongy bone that gives it strength without adding weight?

Rationale:
A. Eversion refers to turning the sole of the foot outward and is unrelated to shoulder movement.
B. Lateral rotation involves rotating a limb away from the midline along its long axis, not lifting it sideways.
C. Elevation is the upward movement of a body part, such as shrugging the shoulders, not moving the arm laterally.
D. Abduction is the movement of the upper limb away from the midline of the body at the shoulder joint, such as raising the arms sideways to form a “T” shape with the torso. This action increases the angle between the arm and the body.

Rationale:
A. A joint (also called an articulation) is the location where bones come together. Joints allow varying degrees of movement, depending on their type: synarthroses (immovable), amphiarthroses (slightly movable), and diarthroses (freely movable, also called synovial joints).
B. Blood cells (red blood cells, white blood cells, platelets) are components of blood, not related to joints.
C. Muscle tissue is contractile tissue that enables movement, but it is not the definition of a joint.
D. While technically true that joints are part of the skeletal system, this answer is too vague and does not fully define what a joint actually is.