Practice question

The correct answer is C: Optic disc. In Sensory System Eye Physiology, this idea is central because it matches how the body actually works in everyday teaching examples. Put simply, cause and effect line up with Optic disc — that is the mechanism or reason the stem is pointing to. That is why Optic disc is the option that holds up when you check it against basic physiology. When you revise, say the answer out loud with one short reason attached; that sticks better than rote lists. Remember that physiology questions reward precise language: name the process, the location, and the outcome, then match that to the option text.