Zoe's voluntary action of choosing to move her leg out of the way is labeled as point D. Point B is the one from which signal travels down spinal cord to skeletal muscle. Zoe uses muscle to move leg out of the way from point C.
What are voluntary action?
Voluntary action occurs when an action is performed with the involvement of thoughts.
Voluntary actions are usually being controlled by brain. These are the actions that are takes consciously which is done by coordination of brain and spinal cord.
In the given scenario, Point D represents Zoe's voluntary action of moving her leg out of the way. Point B is where the signal travels down the spinal cord to the skeletal muscle. Zoe uses muscle to move her leg away from point C.
Thus, the answer is point D.
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