The answer option which demonstrates an organ providing a force is: B. The heart contracts and expands to move blood.
In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation (expansion) of the atria and ventricles, therefore providing a force and causing blood to flow unidirectionally (one direction) throughout the human body.
A force can be defined as a push or pull of an object or a physical body, which typically results in a change of motion due to the interaction of the object with another.
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